I know that a neutered dog should not have testicles, but I was wondering if there was any type of operation that can be done on a male dog in which he would keep them? My partner recently got an 18 month old Blue Heeler for free, because his old owners didn't want him anymore. They gave us his vet certificate, and on it it says he is desexed. However, the dog very clearly still has his balls. Were we given the wrong information, or is it possible that the dog had an internal operation such as getting his tubes tied?