I was curious, shelters spay and neuter puppies as young as 8 weeks before they're adopted out, but veterinarians advise against it due to health risks. My question is, if shelters do it could a breeder also sell you an 8 week old puppy that has already been altered upon your agreement to but the puppy as a "pet"? Wouldn't this enable the breeders to ensure their puppies don't end up in a puppy mill or a back yard breeder? As far as contracts go know they are legally binding and it is a big deal if that contract is broken, but how do breeders keep track of if you've broken your contract? I am just curious.