Yesterday I ended up with two 7 day old kittens. We are working on some rescue arrangement as I can't keep them longer than a few days. They seem to be doing fine, finally getting the hang of that bottle, quit active, they don't see to have any pain or discomfort, but they won't poop at all. They pee just fine with a damp cotton ball but no number two. Is this normal? I have never nursed kittens before so I have no clue. Any advice?