Amphibians with feet and hairless mammals with feet are two very diverse groups that have a lot in common, so it's difficult to separate them without knowing a bit about their biology. It'll take a few more questions to narrow down which of these two groups your animal fits into.
- Its ears stick out from its head. (Mammals - Class Mammalia)
- Its ears are either little holes in its head or not visible. (Amphibians and some mammals)