PMID- 31864455 OWN - NLM STAT- MEDLINE DCOM- 20200730 LR - 20200730 IS - 0737-0806 (Print) IS - 0737-0806 (Linking) VI - 84 DP - 2020 Jan TI - Factors Affecting the Rate and Measurement of Feed Intake for a Cereal-Based Meal in Horses. PG - 102869 LID - S0737-0806(19)30618-5 [pii] LID - 10.1016/j.jevs.2019.102869 [doi] AB - The rapid intake of high-cereal, low-roughage meals may cause gastrointestinal and behavioral disorders. We investigated some of the factors that can affect the rate of intake (ROI) in four separate studies. Study 1 investigated the effect of chaff length and addition rate on the ROI of oats. The ROI decreased as more chaff was added to the diet, attaining significance (P < .05, n = 6) at levels above 15% addition and reaching a plateau at approximately 50%. This was independent of stalk length (1.4 cm vs. 4.1 cm). Study 2 showed that meal size (varying from 0.5 to 4 g/kg BW) did not affect the ROI for a cereal-based meal, nor was ROI altered by the addition of 10% molasses (n = 6). Study 3 demonstrated that ROI changed markedly over the course of a meal, commencing at an average rate of 74 g/minute for the first 5 minutes and decreasing to 15.8 g/minute after 30 minutes (n = 6). Study 4 examined the effects of breed, BW, exercise, and gender in 71 horses. In Clydesdales, BW affected ROI (P < .05), and Clydesdales had a faster ROI than Thoroughbreds of similar BW (81.8 +/- 6.8 vs. 66.0 +/- 3.35 g/minute; P < .05). Exercise level, age, and gender did not impact ROI significantly. The results highlight the effectiveness of feeding chaff to slow ROI and demonstrate the need for a standardized protocol if ROI is to be compared between different studies. CI - Copyright (c) 2019 Elsevier Inc. All rights reserved. FAU - Campbell, Tara E AU - Campbell TE AD - School of Animal and Veterinary Sciences, Charles Sturt University, Wagga Wagga, NSW 2650, Australia. FAU - Doughty, Hunter AU - Doughty H AD - School of Animal and Veterinary Sciences, Charles Sturt University, Wagga Wagga, NSW 2650, Australia. FAU - Harris, Patricia A AU - Harris PA AD - Equine Studies Group, WALTHAM Centre for Pet Nutrition, Waltham-on-the-Wolds, Leicestershire LE14 4RT, United Kingdom. FAU - de Laat, Melody A AU - de Laat MA AD - Earth, Environmental and Biological Sciences, Queensland University of Technology, Brisbane, Queensland 4001, Australia. FAU - Sillence, Martin N AU - Sillence MN AD - Earth, Environmental and Biological Sciences, Queensland University of Technology, Brisbane, Queensland 4001, Australia. Electronic address: martin.sillence@qut.edu.au. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20191122 PL - United States TA - J Equine Vet Sci JT - Journal of equine veterinary science JID - 8216840 RN - 0 (Dietary Fiber) SB - IM MH - Animal Feed/analysis MH - Animals MH - Diet MH - Dietary Fiber MH - *Edible Grain MH - Horses MH - *Physical Conditioning, Animal OTO - NOTNLM OT - Concentrates OT - Equine OT - Nutrition OT - Roughage OT - Starch EDAT- 2019/12/23 06:00 MHDA- 2020/07/31 06:00 CRDT- 2019/12/23 06:00 PHST- 2019/02/25 00:00 [received] PHST- 2019/11/04 00:00 [revised] PHST- 2019/11/16 00:00 [accepted] PHST- 2019/12/23 06:00 [entrez] PHST- 2019/12/23 06:00 [pubmed] PHST- 2020/07/31 06:00 [medline] AID - S0737-0806(19)30618-5 [pii] AID - 10.1016/j.jevs.2019.102869 [doi] PST - ppublish SO - J Equine Vet Sci. 2020 Jan;84:102869. doi: 10.1016/j.jevs.2019.102869. Epub 2019 Nov 22.