The study aimed to investigate the impact of postbiotics on the pet health.Twelve Beagle dogs were selected,and following the principles of consistent weight and gender,they were randomly divided into two groups(Group A and Group B),each replicate consisting of six dogs,with one dog in each replicate.A crossover trial design was employed to compare the differences in serum biochemical indexes and fecal microbiota between adult healthy Beagle dogs during the consumption of a diet supplemented with 200 g/d postbiotics and a control diet.The results showed that the average fecal score for Beagle dogs consuming the base diet was 2.97,while for those consuming the diet supplemented with postbiotics,the average fecal score was 2.54.Compared to the base diet,Beagle dogs consuming the postbiotic-supplemented diet exhibited a 51.16%decrease in serum triglyceride levels(P<0.05),a 29.92%decrease in cholesterol levels(P<0.05),and an 11.43%decrease in the serum uric acid levels(P<0.05).In comparison to the base diet,dogs fed the postbiotic-supplemented diet showed a 7.85%,23.97%,and 29.54%decrease in the serum immunoglobulin G(IgG),tumor necrosis factor-α(TNF-α),and interleukin-1(IL-1)levels,respectively(P<0.05).The supplementation of postbiotics increased the relative abundance of beneficial bacteria such as Lactobacillus and Bacillus in the feces,while reducing the relative abundance of harmful bacteria like Fusobacterium and Anaerobiospirillum.The study suggests that supplementing postbiotics in the diet can improve the intestinal health of dogs.
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