Methionine Supplementation Affects Fecal Bacterial Community and Production Performance in Sika Deer ().

Amino acid balance is central to improving the efficiency of feed protein utilization and for reducing environmental pollution caused by intensive farming. In previous studies, supplementation with limiting amino acids has been shown to be an effective means of improving animal nutrient utilization and performance. In this experiment, the effects of methionine on the apparent digestibility of nutrients, antler nutrient composition, rumen fluid amino acid composition, fecal volatile fatty acids and intestinal bacteria in antler-growing sika deer were investigated by randomly adding different levels of methionine to the diets of three groups of four deer at 0 g/day (CON), 4 g/day (LMet) and 6 g/day (HMet).

Effect of supplementation on growth performance, serum immunity, antioxidant status, and intestinal health in winter fur-growing raccoon dogs ().

Introduction: This study aimed to investigate the effects of supplementation on the growth performance, nutrient utilization, serum biochemistry, immunity, antioxidant status, and intestinal microbiota of raccoon dogs during the winter fur-growing period.

Methods: Forty-five 135 (±5) day-old male raccoon dogs were randomly assigned to three dietary groups supplemented with 0 (group N), 1 × 10 (group L) and 5 × 10 CFU/g (group H) , with 15 raccoon dogs per group.

Results: The results showed that in groups L and H improved average daily gain (ADG) and decreased feed-to-weight ratio (F/G) ( < 0.