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Influence of time of feeding on dam performance prepartum and postpartum and its impact on its kids



This study was conducted to evaluate the impact of time of feeding on the performance of WAD goats during pregnancy, and to assess how the time of feeding of the dam affect the growth of their kids’ postpartum. Twelve (12) pregnant does were used in the pre-partum and in the postpartum, the same 12 lactating does and their 12 kids (1 kid per doe) were used. The dams were randomly distributed into three treatments and were fed once daily either in the morning, noon, or evening at 0600 h, 12:00 h and 18:00 h respectively under the natural light–dark cycle.


Serum creatinine in noon-fed does was higher (P = 0.005) than in morning and evening-fed does. In addition, low density lipoprotein in morning-fed gravid does was the high (P = 0.007) compared to noon-fed does while the evening-fed does had the lowest. During postpartum, morning and noon-fed dams consumed more feed (forage, concentrate, and total daily feed intake) than evening-fed dams (P ≤ 0.006). Kid weight of morning-fed does was numerically higher than noon-fed does, which was higher than kids of evening-fed does.


This study shows that time of feeding did not affect the performance of pregnant WAD goats. However, it has the potential to influence the serum parameters of pregnant animals. It also showed that time of feeding influences maternal feed intake postpartum and can influence the growth of the kids.


Many physiological functions in the body exist in a circadian rhythm, which are under the control of the suprachiasmatic nucleus (SCN) located in the hypothalamus which serves as master clock and control clocks that exist in other visceral tissues known as peripheral clocks via hormonal, nutrient, and visceral cues (Adamovich et al. 2014; Challet 2019). The peripheral clocks in the body can be controlled by time of food consumption when time of feed intake is different from normal time of feeding leading to a desynchronization between the master clock and peripheral clocks (Damiola et al. 2000; Plaut and Casey 2011). This desynchrony can affect insulin sensitivity of body tissues, nutrient absorption and nutrient use in mammary and non-mammary tissues (Nikkhah et al. 2008; Pan and Hussain 2009; Niu and Harvatine 2018). The tendency of feed intake time to invert the expression of several physiological and productive rhythms imply that it could have impact on dam and fetus development. However, there are no studies on the influence of feeding time on pregnancy in goats. Studies in human—a diurnal mammal shows that circadian misalignment found to occurs in night shift workers causes alteration in physiological parameters such as hormone and sleep–wake cycles (Nehme et al. 2019) and the occurrence in pregnant humans, increased the risk of negative consequences such as abortion, low birthweight, and preterm birth (Whelan et al. 2007, Lawson et al. 2009, Fernandez et al. 2016). Performance of offspring has been linked with the rate of blood flow in dams between the uterus and placenta (Wu et al. 2006) with lower blood flow causing poor development (Lemley 2017). Manu et al. (2019) reported that pregnant sows fed daily ration at latter times of the day (11:30 h and 15:30 h) had higher weight compared to those receiving it early (07:30 h), but it did not affect birth weight. This suggest that time of nutrient delivery can affect nutrient flow to the placenta and mammary gland which can affect fetal growth and performance, udder development and lactational yield.

The undeniable relationship between nutrition and its impact on neonate development in mammals is established and the success of conception to parturition phase is influenced by many factors including nutrition and management strategies (Fontaine 2012; Spencer 2013). Prepartum and postpartum, the neonate depends exclusively on the dam for nutrient supply, colostrum, and milk till weaning or until they can take other solids apart from milk. Due to the impact of time of feeding as a potent zeitgeber for peripheral circadian clocks, altered feeding time would affect both mammary and non-mammary nutrient uptakes, and as a result, milk secretion and peripheral nutrient retention can be improved or reduced (Nikkhah 2011). Nikkhah et al. (2008) and Salfer and Harvatine (2020) have established that time of feeding affects milk yield and composition. Based on the above scenario, alteration of milk yield and composition may affect the preweaning performance of their kids. Preweaning performance of goat kids is important because the survival and weight gain of kids from birth to weaning impact lifetime productivity and profitability of goat industry (Akpa et al. 2010; Andries 2013). It is predominantly influenced by maternal milk production and can affect preweaning weight gain, weaning weight and future reproductive performances (Luginbul 2002; Snyman 2017; Sikiru and Makinde 2018). However, there is no study that has reported on the impact of time of feeding on gravid dams and blood metabolites, and preweaning performance of dams and kids. It is therefore novel to investigate the influence of the time of feeding on goat performance and blood metabolite during pregnancy. Also, we look to investigate how the time of feeding of a dam affect the growth of her kids.


Experimental site

All experiment phases were carried out at the Goat unit, Teaching and Research farm of the Federal University of Technology, Akure. The grass (Panicum maximum) was obtained from Federal University of Technology, Akure campus using cut and carry method. The experiment is grouped into two phases, the prepartum and post-partum phase.

Performance of pregnant does during prepartum phase

Experimental procedure

Twelve primiparous does were used for the experiment and grouped into three treatments of four replicates and weighed prior to mating. The does used for mating are 36 months old. The does were synchronized by natural method with virile bucks to stimulate ovulation and served two times after signs of heat. The does were housed individually with free access to water and feed diet (Table 1). The does were fed once daily at either 06:00 h, 12:00 h and 18:00 h, respectively under the natural light–dark cycle. Feeding trail for each animal started 21 days after the initial mating when the animals did not return to heat, and they were observed for another 21 days after the feeding trail had started. In total, the experiment from mating to parturition occurred between December 2019 to May 2020. The performance of the does during pregnancy were evaluated by calculating the daily feed intake as the difference between feed offered and leftover weight. The weight of the gravid does was taken weekly and used to calculate the total pregnancy accretion and average daily pregnancy accretion. On the day of parturition, the birth weight, the number of kid(s), and the postpartum dam weight were taken.

Table 1 Chemical composition of experimental diet (g/100 g)

Serum and haematology

Blood samples were collected from the gravid does 24 h post-feeding at the fifth month of parturition respectively via the jugular vein puncture using hypodermic syringes into Vacutainer tubes (Becton Dickinson, Franklin Lakes, NJ, USA). Blood sampling from each animal was performed at the same hour of the day when each group of animals were fed by veterinarians to minimize stress. Ten (10ml) of blood samples were collected with 2 ml in ethylenediaminetetraacetic acid bottles and 8 ml in non-ethylenediaminetetraacetic acid bottle for hematological and serum biochemical assay respectively. Haematological parameters such as packed cell volume, white blood cell, white blood cell different counts, red blood cell, erythrocyte sedimentation rate and haemoglobin were carried out according to Dacie and Lewis (2001). The red blood cell, haemoglobin, and packed cell volume values were used to calculate the mean corpuscular haemoglobin concentration, mean corpuscular haemoglobin, and mean corpuscular volume using appropriate formulae by Dacie and Lewis (2001). Albumin, globulin and total protein was determined using the colorimetric bromocresol green method of Clinichem reagent kit Budafoki street, Budapest, aspartate aminotransferase, and alanine aminotransferase were carried out with the method provided by Sigma-Aldrich® assay kit, serum parameters such as glucose, urea, creatinine, alkaline phosphatase, triglyceride, cholesterol, lipoproteins (HDL and LDL) were determined using a commercial test kit (Randox Laboratories Ltd., Crumlin, Co. Antrim, UK) and finally measured using a UV Spectrophotometer (SEAC, Florence, Italy). The ambient temperature and relative humidity were measured by digital hygro-thermometer (Thermopro TP50). The temperature humidity index was determined from the recorded daily relative humidity and ambient temperature according to Marai et al. (2001);

$${\text{THI}} = {\text{db}}^\circ {\text{C}} - \left\{ {\left( {0.31 - 0.31\;{\text{RH}}} \right)\left( {{\text{db}}^\circ {\text{C}}{-}14.4} \right)} \right\}$$

where THI = Temperature–humidity index, db°C = Dry bulb temperature °C. RH = Relative humidity (RH %)/100.

THI was rated as follows: ahs = absence of heat stress (values < 22.2), mhs = moderate heat stress (values between 22.2 and < 23.3), shs = severe heat stress (values between 23.3 and < 25.6), ehs = extreme heat stress (values from 25.6 and more).

Performance of does during postpartum phase

Does, feeding and experimental design

The post-partum experiment lasted for 6 weeks with twelve pregnant WAD does and their twelve kids. Each doe gave birth to one kid. The does were on their first parity and they were maintained in the same treatment from the prepartum phase. All kids were kept with their dam except during milk yield intake record. Furthermore, the dams were housed individually, had free access to feed which was grass (Panicum maximum) and concentrate (Table 2) in 50:50 dry matter ratio. The goat-does were fed once daily in the morning, noon, or evening at 06:00 h, 12:00 h or 18:00 h respectively under the natural light–dark cycle.

Table 2 Gross composition (g/100 g) of the concentrate

Kids performance during postpartum

At birth the initial weight was taken, and afterwards the kids were weighed weekly, and the weight was used to calculate the weight gain, average daily gain, and the kid final weight. The average daily weight gain was calculated after estimation of weaning weight. All kids were allowed to stay one week with their mother postpartum to build intimacy with their dam and to allow enough time for colostrum intake. All days of the weeks the kids remained with their dam, except on days when milk offtake record was to be taken. Average daily gain was calculated as the total weight gain divided by the number of days between birth and weaning. The postpartum lasted for 6 weeks.

Milk offtake record of kids

The milk yield was measured by an indirect method using the weigh-suckle-weigh method (Williams et al. 1979). Prior to taking milk intake records, the kids of all dams were withdrawn at 18:00 h the previous day irrespective of the feeding time of their dam. The milk intake records were taken three time in week and five times per day. The kids suckled their dam five times a day at 06:05 h, 09:00 h, 12:05 h, 15:00 h, and 18:05 h and were withdrawn 15 mins later for weighing. Dams that did not allow their kids to suckle were restricted to permit suckling. This milk offtake data was collected for five weeks starting from the 2nd, 3rd, 4th, 5th, and 6th week postpartum and the average milk intake was calculated.

Chemical and mineral analysis

The proximate of feed samples was analyzed for Ash (method ID 942.05), N from Kjeldahl method (method ID 954.01), Ether extract (method ID 920.39) according to (AOAC 1997). The Neutral detergent fibre (NDF), acid detergent fibre (ADF), and acid detergent lignin (ADL) were analyzed according to (Van Soest et al. 1991). Hemicelluloses was calculated as NDF-ADF while cellulose was calculated as ADF-ADL.

Data analysis

For the dam record during prepartum and postpartum, and kids completely randomized design was used. All data collected were subjected to analysis of variance (ANOVA) using SPSS version 23.0 (SPSS 2015). The differences between treatment means were examined by Duncan multiple range test of the same package.


Performance and blood profile of gravid does

Feeding WAD does once daily in the morning, noon or evening did not affect (P > 0.05) feed intake, growth performance, and haematology of pregnant WAD goats (Tables 3, 4). Notwithstanding, the total weight gained during gestation showed that the does fed in the evening had highest weight while those fed at noon had the lowest weight. The average gestation period in this study (141–143 days) is lower than the average 150 days expected of goats. Serum creatinine in noon-fed gravid does was higher (P = 0.005) than in morning and evening-fed does. The serum low density lipoprotein decreases as the time of feeding moved from dawn to dusk. The does fed in the morning had the highest (P = 0.007) low density lipoprotein while the evening-fed does had lowest. The environmental parameters showed that during the experimental period, the ambient temperature of the morning was the lowest (P < 0.001), followed by the evening temperature while the highest temperature was recorded at noon. In contrast, result of the relative humidity showed that morning period had the highest value (P < 0.001) followed by the evening period while the afternoon had the lowest. The temperature humidity index showed that morning feeding time had the lowest (P < 0.001) while noon feeding time had the highest (Table 5).

Table 3 Performance of WAD gravid does during pregnancy
Table 4 Haematological parameter of Gravid WAD does during pregnancy
Table 5 Serum parameter of Gravid WAD does during pregnancy under different feeding time

Feed intake of lactating WAD does and preweaning performance of WAD kids

Table 6 shows the feed intake and growth performance of WAD does. The result shows that feeding in the morning and noon enhanced (P ≤ 0.002) daily feed intake and daily forage intake than evening feeding (Table 6). The does fed in the evening had the lowest feed intake while those fed in the morning and noon had similar feed intake. Furthermore, lactating WAD does fed in the morning had the highest (P = 0.006) concentrate intake while those fed in the evening had the lowest. Noon-fed lactating does had the highest forage intake while those fed in the evening had the lowest forage intake. Kids born to dams fed in the morning consumed (P < 0.001) more milk than kids of dams fed at noon and evening. Kids born to morning-fed dams had numerically higher weight postpartum than other treatments. However, time of feeding of dams had no impact (P > 0.05) on average daily gain and total gain at weaning.

Table 6 Feed intake (g DM/d) of WAD does postpartum and pre-weaning performance of WAD kids


Performance and blood profile of gravid does

Gestation period is very important in reproductive performance of animal. The gestation period of goats in our study was lower than the average of 144.9 days reported by (Akusu and Ajala 2000). This may be associated with the variation in the treatment between studies or the variation in diet used. Nonetheless, the lowest days of gestation in the evening-fed does may be associated with the time of feeding. Report from Whelan et al. (2007) and Lawson et al. (2009) in pregnant diurnal mammals showed that there is a possibility of early birth. This could be the reason for the shortest gestation period in evening-fed goats. Serum physiological parameters are non-invasive method to assess the health of an animal (Jimoh et al. 2019). Blood urea nitrogen and creatinine are the final product of protein metabolism, and they are often regarded as indicator of renal functions (Song et al. 2020). Furthermore, in heat stressed animals, plasma cholesterol was reported to decrease while creatinine increased (Abeni et al. 2007; Baumgard and Rhoads 2013; Van laer et al. 2015). Plasma creatinine—an indicator of skeletal muscle breakdown—can increase in the blood serum due to heat stress (Abeni et al. 2007). The temperature humidity index in this study showed that all goats were heat stressed. The general heat stress in all goats can be attributed to the well-known high ambient temperature in the tropics. However, the highest index from the afternoon feeding time showed that the does fed at noon experienced more heat stress. This may be due to the coincidence of high ambient temperature with metabolic heat production due to feeding period. This heat stress was further confirmed by the increased serum creatinine in noon-fed gestating does. Thus, the higher heat stress in noon-fed pregnant goats may be the reason for the increase in blood creatinine compared to morning and evening-fed does. Although not reported in pregnant goat, dyslipidemia have been reported to occur in pregnant and non-pregnant humans who eat at “wrong time” of the day, resulting in elevated blood cholesterol, triglycerides, LDL cholesterol, and lower HDL cholesterol, and could increase pre-term birth risk (Bailey et al. 2014; Jiang et al. 2017; Reinke and Asher 2019). In our study, LDL in noon-fed does was lower than morning-fed does while evening-fed goats had the lowest LDL. The reason for this contrasting result in LDL profile is not known at this time. However, Leibowitz (1988) reported on the preference of animals for protein and fat as nutrient at the expense of carbohydrate when fed at the inactive phase/wrong time, because melatonin secretion which is higher at night reduces glucose uptake from the blood (Van Cauter et al. 1998; Qaid and Abdelrahman 2016) in diurnal mammals. Thus, the increasing demand for nutrients by the fetus, and lower glucose uptake in evening-fed animals due to insulin insensitivity at night might have caused the mobilization of cholesterol as alternative form of energy resulting in lower availability of LDL-cholesterol in evening-fed does compared to other feeding time. Overall, the serum parameters in our study are similar to Jimoh et al. (2019) for late gestating WAD does.

Feed intake of WAD does and preweaning performance of WAD Kids

During postpartum higher daily forage and concentrate intake in morning and noon-fed does compared to evening-fed does in our study contradicts the report of Nikkhah et al. (2006, 2008) who reported that feed intake in the evening-fed cows was higher than morning-fed dairy cows. This variation may be attributed to the light unavailability in our study after evening feeding which reduced their intake. In these studies (Nikkhah et al. 2006, 2008), illumination was provided for 3 h post-feeding in the dairy cow fed in the evening compared to our study where there was not light post-feeding.

Preweaning performance is an important parameter because it could affect the survival and weight gain, and impact the lifetime productivity and profitability of livestock industry. Since the offspring depends on the dam for their nutrient intake, the maternal nutrition of a dam could affect the growth and skeletal muscle development in livestock species during pre-weaning phase of their development. In this study, the average weight of kids born to morning-fed does was higher than kids born to noon and evening-fed does. The increased weight and weight gain of the kids that belong to morning-fed does is not surprising as they took more milk. Nonetheless, the weight at birth of this study is within the range reported by Oseni et al. (2017) and Oderinwale et al. (2020) for WAD kids. Furthermore, average daily gain in this study is within the range reported by Ayizanga et al. (2018) and Oderinwale et al. (2020). This suggests that the time of maternal nutrient intake could affect kids performance.


In this study, we found that time of feeding did not affect the feed intake, growth performance and haematology of gravid WAD does. However, feeding time affected the serum parameters such as decrease in low density lipoprotein as feeding shifted from dawn to dusk and increased serum creatinine in gestating does fed at noon. Furthermore, during the postpartum phase, time of feeding influenced the feed intake of lactating does with a decrease in total intake as feeding shifted from dawn to dusk. Also, the choice of intake (forage or concentrate) was influenced by feeding time as morning-fed lactating does had the highest concentrate intake while noon-fed does had the highest forage intake. Similarly, kid weight and daily gain of morning-fed does was similar but numerically higher compared to other feeding time. It was observed that irrespective of the time of feeding all goats were still heat stressed though the noon-fed gestating does were the most stressed while the morning-fed gestating does were least stressed.

Thus, based on this study, we conclude that time of feeding has influence on serum parameters during gestation, affects maternal feed intake postpartum and this impact on maternal nutrient intake could influence kids preweaning performance.

Availability of data and materials

It is available from the corresponding author on reasonable request.



West African Dwarf


Suprachiasmatic nucleus


High density lipoprotein


Low density lipoprotein


Relative humidity


Average daily gain


Acid detergent fibre


Acid detergent lignin


Neutral detergent fibre


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The authors acknowledge the staff of Federal University of Technology, Akure Farm, and the Technologists in the laboratory of the Department of Animal Production and Health, and Biochemistry Department of Federal University of Technology Akure. We also thank the anonymous reviewers for their suggestions in improving this manuscript.


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MJA, ANF, and SOA, conceived and designed the experiment; MJA, DDO, and MEA conducted the experiment; ANF, SOA, and OBO performed supervision; MJA and TOF prepared the manuscript. All authors read and approved the final manuscript.

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Correspondence to Moyosore Joseph Adegbeye.

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Adegbeye, M.J., Omotoso, O.B., Fajemisin, A.N. et al. Influence of time of feeding on dam performance prepartum and postpartum and its impact on its kids. Bull Natl Res Cent 45, 204 (2021).

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