What mammal hatches eggs and has young that feed on milk from the pores?

Here's why:

* Egg-laying: Echidnas, like platypuses, are monotremes. This means they lay eggs, unlike most mammals which give birth to live young.

* Milk from pores: Echidnas don't have nipples. Instead, they have milk glands that secrete milk through pores on their abdomen. The young lick up the milk from these pores.

Let me know if you have any more animal riddles for me!