Effects of direct-fed microbial supplementation on digestibility and fermentation end-products in horses fed low- and high-starch concentrates

Journal of Animal Science
K L SwyersJ L Shelton

Abstract

A study was conducted to determine whether direct-fed microbials (DFM) could be used to increase digestibility and minimize the risk of acidosis associated with feeding an increase in the amount of starch fed to horses. Fifteen mature Thoroughbred geldings were randomly assigned to 1 of 3 treatments in a 3 x 3 Latin square design balanced for carryover effects. Within each 26-d period, horses were offered grass hay + low-starch concentrate (LS; 1.2 g of starch x kg of BW(-1) x meal(-1)) from d 1 to 13 and then were abruptly changed to hay + high-starch concentrate (HS; 2.4 g of starch.kg of BW(-1)x meal(-1)) on d 14 continuing through d 26. The DFM treatments were offered in concentrate pellets at a target dosage of 10(8) cfu/(50 kg of BW x d) as follows: no DFM (CON; control), Lactobacillus acidophilus (LAC1; single-species DFM), or a mixture of L. acidophilus, Lactobacillus casei, Bifidobacterium bifidum, and Enterococcus faecium (LAC4; multiple-species DFM). Total feces were collected over 72 h from d 11 to 13 (LS; low dietary starch collection), from d 15 to 17 (AC; abrupt change in dietary starch collection), and at the end of each experimental period, from d 24 to 26 (HS; high dietary starch collection). Data collected co...Continue Reading

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Citations

Sep 6, 2014·Journal of Nutritional Science·Megan L ShepherdWilliam S Swecker
Mar 24, 2009·The Veterinary Clinics of North America. Equine Practice·Becky Hothersall, Christine Nicol
Feb 19, 2014·Equine Veterinary Journal·K M Brennan, K L Urschel
Sep 1, 2015·Animal : an International Journal of Animal Bioscience·C PhilippeauV Julliand
Jul 23, 2014·Asian-Australasian Journal of Animal Sciences·D J SongD P Bu
Dec 9, 2016·Animal : an International Journal of Animal Bioscience·S Sadet-BourgeteauV Julliand
Jan 6, 2015·Journal of Equine Science·Saori IshizakaHiroshi Matsuda
Jan 1, 2012·Animals : an Open Access Journal From MDPI·Jessica K SuageeRaymond J Geor
Sep 10, 2018·Translational Animal Science·Alexa C B Johnson, Heidi A Rossow
Mar 31, 2021·Journal of Equine Veterinary Science·C Giselle CookeJoanna E Harnett
Aug 17, 2021·Animal Reproduction·Carlota Quiñones-PérezJosé Luis Vega-Pla

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