Student or Learner
By "animal waste", do you mean "excrement like dung or pee" or "animals' dead body"? The translation goes the former, so I'm confused.
ex)Sometimes you have to eat things you don't like, but don't complain. Just be grateful you're not a dung beetle. They eat nothing but animal waste...
"Dung" is a word for animal excrement. If you look up information on the dung beetle you will see what a delicious diet they have! Though I have to say they are incredible animals, very organised and incredibly strong. I could watch them for ages when I was in South Africa.
I thought dung is a general term both human beings and animals. Then should you use "poo" for human beings?
In AmE it's "stool" (no S) and "feces" (no A). Dung would only be used for animal (non-human) waste, but it does mean the same thing. I don't think it's that common actually.