The little baby I found last Sunday has quite a little belly on her. She has no problem peeing but her stool is loose and she cries when she's about to go. Her belly is seeming to get bigger and it is starting to worry me. She's almost 4 weeks old. She's been on KMR since I found her. Any ideas what this could be? She's been to the vet and they didn't seem too concerned. I got her some belly meds (like Tagamet) from the vet yesterday-but it still concerns me. Her activity level is good-as is her appetite. Maybe I am worrying for no reason?