Sorry to anyone who finds this topic gross... My sister's boxer was 'fixed' when he was almost 2, per their vet's suggestion. He said Duke appeared to have a "puckered anus" and that this could lead to future health problems, such as cancer, if the dog wasn't neutered soon. Has anyone else ever heard of such a problem? Our baby, Tag, just turned two and has not been neutered. However, I have noticed that his anus does poke out a bit. It's not swollen or red or anything like that, just seems to "protrude". Should I be concerned? He isn't due for his annual vet visit until February.