Doedicarus is an ancient armadillo. After the dinos tried anky mammals decided to give it a go too resulting in a hilariously similar but unrelated animal. So folks wondering where the egg is, it doesn't lay eggs because it is a mammal. Not even an OLD school reptilelike mammal. It's literally a massive armadillo.

Was going to put this on the dino egg requests thread but someone else had already mentioned the mammal thing and it seemed to have been buried so I thought maybe being its own discussion would help remove some confusion.