Even though the vets here anyway, like to wait until 5 or 6 mos. he may be close enough or big enough they would feel comfortable neutering him..I asked the vet when I was in with Ginger about that, as my son has Gingers brother(he's 4 1/2 mos), she said most likely once they're fixed, they will quit..Teddy doesn't do it at home, but, when he comes over to Grandmas he does..