Does a female Duck-Billed Platypus produce milk?

Yes, but they do not have nipples. The milk is simply secreated through her skin.

~Garnet

Homesteading/Farming over 20 years

Longstanding interest in Australian wildlife

it is a mamal, just because it can lay eggs doesn't mean it that it can't produce milk, Monotremes are a category of mamal.

yes because it's a mammal - although it doesn't give birth to live young! (it lays eggs!)

Yes, it's a mammal.

yes