Go to an area filled with dodos usually and there is high probability you will find some dodos with name "bunny dodo". Those guys drop the bunny eggs and some other creatures too will drop it. Some bunny creatures I think also drop the bunny candy but I am not 100% sure.

How do bunny's lay eggs???it doesn't make sense

It’s from bunny animals! Bunny dodos and Oviraptors!!

Most things like dodos lay eggs in the Easter event