Casein hydrolysate supplementation in low-crude protein diets increases feed intake and nitrogen retention without affecting nitrogen utilization of growing pigs.

Using protein hydrolysate to replace some crystalline AAs in low-CP diets increased feed intake, N retention and ADG without affecting N utilization. These findings point to the important impact of protein hydrolysate supplementation on improving growth for pigs fed low-CP diets. © 2019 Society of Chemical Industry.