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This study aimed to evaluate the addition of IgY in a diet and its effects in the systemic health and gastrointestinal tract (GIT) of dogs.
Therefore, sixteen healthy 11-month-old Beagle dogs were distributed at random (eight animals/treatment) in two treatments groups: control (0 g/kg IgY) and test (2g IgY/day). The animals were evaluated on days 0 and 40 for a complete blood count (CBC) and biochemical profiles (ALT, ALP, Creatinine and Urea). Faecal samples were collected from days 35 to 40 to measure nutrient digestibility, faecal characteristics, sialic acid, intestinal microbiota composition and microbial metabolites. The CBC, biochemical profiles, apparent nutrient digestibility and faecal characteristics did not differ between the two treatments (P>0·05). Dog faeces that received IgY were characterized by lower sialic acid and n-valeric concentration, as well as an increase in n-butyric concentration, in contrast to dogs fed a diet without IgY (P<0·05). The other microbial faecal metabolites did not differ between the two treatments (P>0·05). There tended to be an increase in the copy number of Clostridium cluster XIVa (C. coccoides group) in the IgY group in contrast to the control group (P=0·07). The other bacteria analysed did not differ between the treatments (P>0·05). The colonic pH in the IgY group was lower than in control group (P<0·05).
The addition of IgY in the diet of healthy dogs maintains the microbial balance and has an interesting effect on microbial metabolites.
The use of IgY, antibodies produced by laying hens, in animal feed is an alternative for the prevention and treatment of intestinal diseases in companion animals. This article is protected by copyright. All rights reserved.