No reason...he was my first dog.I got him when i was 16 so it was lack of knowledge. I learned from him & he was our only dog until I got the mastiffs.By then the vet didn't recomend it because of his age.Truman on the other hand we got to breed.He's ckc reg. & has had all his health tests so it's a shame to have him neutered but I can't have him guarding cloe all the time...