# Yak meat content in feed and its impact on the growth of rats

## TL;DR

This study examines how different proportions of yak meat in rat feed affect their growth and finds that a 4:6 ratio of yak meat to regular feed is most effective.

## Contribution

The study identifies the optimal yak meat-to-feed ratio for enhancing rat growth performance.

## Key findings

- Rats fed with a 4:6 yak meat-to-basal feed ratio showed the best body condition and health.
- The 4:6 diet resulted in normal body and tail lengths and smaller waist circumferences.
- This diet outperformed other yak meat proportions in terms of growth performance.

## Abstract

To evaluate the effects of varying proportions of yak meat in feed on the growth of rats and provide a theoretical basis for selecting the optimal feed proportion suitable for rats. This study was designed as a one-variable experiment. Fifty male rats were divided into five groups. The ratios of yak meat to basal feed of rats in four dietary treatment groups were 2:8, 4:6, 6:4, and 8:2, respectively, while those in the control group were only provided a basal diet. In the feeding experiment, the body weights of the rats were recorded on Day 0 and subsequently in the first, second, third, and fourth weeks, along with quantities of feed intake. The body and tail lengths, as well as the waist circumference of the rats, were measured, and blood samples were collected in the fourth week for routine blood and biochemistry investigations. The rats in the 4:6 feed group had the best body condition. They had normal body and tail lengths, smaller waist circumferences, good posture, and were in better overall health than rats in the other groups. The results indicate that the 4:6 diet was optimal for enhancing rats’ growth performance compared to the other diets.