As long as they can nurse and get the colostrum into them. Dont be in too much of a rush to bottle feed. We had a set of triplets this spring and one was less than a pound. He could nurse but after the first 48 hours we did pull him for a bottle baby as he was getting bullied by the other two. We sold him to a guy with pygmies and he wanted a tiny buck to increase milk production in their off spring , and moose fit the bill. So now the guy takes moose every where with him.
So cute to see moose in the shopping cart at tractor supply!