For the same solid-liquid separator model, the more coarse fibers in the feces, the better the separation. Therefore, among cow dung, pig dung, and chicken dung, the cow dung and pig dung are easier to separate, while chicken dung is difficult due to its fine and sticky texture. The same goes for sow dung; it is followed by fattening pigs, which are the same young pigs, and their feces are difficult to separate. For these reasons, selecting an inclined sieve solid-liquid separator or a drum sieve solid-liquid separator is more suitable!