Altering your dog is a personal choice, with the exception of the City of Fontana's mandatory ordinance to spay/neuter Pit Bulls or any mixed breed which contain an element of Pit Bull in its breeding. If the dog is recognized by and registered with a national registry such as American Kennel Club (AKC), or United Kennel Club (UKC) this requirement will be waived provided proof of registry is provided at the time of licensing.Please be aware that while in most cases altering your dog is a personal choice, the fees for licensing unaltered dogs are significantly higher than the fees for altered dogs.