Yesterday I had to take the young female back to the shelter (she was too young to spay)and get a 6 month old male...The male, Tanner was neutered sometime yesterday afternoon and required to spend the night (their policy) When I picked him up this AM the vet tech said he had eaten just a little banana, had not pooped but had peed. He is home with me now and has eaten some greens, is very frightened (this is a strange place to him) but has only had one soft poop but did pee again. How long do I wait before I get concerned about lack of poops after a neuter. They didn't give me pain meds but they never do and I have never had a bun that didn't pee and poop quicker.