Well when I 1st got him from the humane society @ 6-8months old (they weren't sure exactly how old) they said pit/shepard mix. Some things happened in my life and I had to give up Ox and he went to animal services. After 3 months went by and nobody adopted him I was able to get him back (thank the lord!) and they said he was hound/ lab mix. When he went to the vet she said greyhound/ pit mix. So I am not sure.