Sick animals eat less feed, but it appears they also have different nutrient requirements.

序言：生病的动物吃很少的食物，但是很明显，他们也有不同的营养需求。

youdao

Sick animals eat less feed, but it appears they also have different nutrient requirements.

序言：生病的动物吃很少的食物，但是很明显，他们也有不同的营养需求。

youdao