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By mixing the feed with fermented biogas slurry in a 1:1 ratio and stirring well, it is possible to achieve good feeding results when feeding both cows and chickens. However, the amount of biogas slurry used must be appropriate; if the ratio of biogas slurry to feed exceeds 1:1, cows and chickens may suffer from diarrhea. The various active substances in biogas slurry, such as amino acids and trace elements, can effectively stimulate the ovulation function of hens’ ovaries and enhance their egg-laying capacity. Therefore, hens fed with manure-mixed feed started laying eggs 20 days earlier, and their egg-laying period was about 50 days longer than that of the control hens; the average annual egg-laying period for the former was 250 days, while it was 200 days for the hens fed on a single type of feed. The egg-laying rate of the former group was 25% higher than that of the latter group. Furthermore, the eggs laid by chickens fed with manure-based feed had an average weight of 46.7 grams per egg, while those laid by chickens fed on plain feed had an average weight of 39.6 grams per egg; the former had a 17.9% higher egg weight compared to the latter. Feeding chickens with manure-based feed resulted in an average weight of 1.8 kilograms over 10 months, whereas the control group of chickens fed without such feed had an average weight of 1.4 kilograms; the former achieved a 28.75% higher weight gain rate than the latter. The various nutrients and hormones contained in biogas slurry can stimulate the milk production function of dairy cows’ milking systems, thereby increasing milk yield. Tests conducted by the Rural Energy Station in Ruichang County, Jiangxi Province, have shown that when dairy cows are fed with feed mixed in a ratio of 1:1 to 1:2 of biogas slurry to feed, their average daily milk production increases by 2.29 to 2.4 kilograms compared to cows in the control group.