I once adopted a 6 week old mix (the vet said it might be a corgi mix) and at 6 months we dropped him off before school and work one day to get him neutered. About an hour later, my mom got a call at work from the vet and was told that Max had nothing to neuter. I think it was a genetic fault or the rescue had him neutered at 6 weeks which is horrible is if they did. Anyway, Max was viscious (sp?) and bit people, even me. He made my little step brother who was 10 at the time get stitches in his face. We had to get rid of him.
Maybe he was viscious (sp?) cause of the genetic fault??