High fat intake and fiber digestibility in ponies
In general, groups mean maximum gas production from either cellulose or xylan by caecal, colon and faecal bacteria was lower when the ponies had been fed the high fat diet. Cumulative gas production by caecal fluid with xylan as substrate after 20 h of incubation was depressed when the donor animals had been fed the high fat diet. With cellulose as substrate, gas production by caecal contents was lowered by on average 20% after fat feeding of the ponies. There was a diet effect of cell-free caecal fluid on gas production from cellulose by a standard inoculum: fat feeding had an inhibitory impact. It is concluded that fat feeding in ponies inhibits microbial activity in the caecum, which in turn leads to a decrease in fiber digestibility.
Title: High fat intake by ponies reduces both apparent digestibility of dietary cellulose and cellulose fermentation by faeces and isolated caecal and colonic contents
Authors: W.L. Jansen, J.W. Cone, S.N.J. Geelen, M.M. Sloet van Oldruitenborgh-Oosterbaan, A.H. Van Gelder, S.J.W.H. Oude Elferink, A.C. Beynen