I got one tamed and name tagged, used a bone on it and it turned into a regular dog, capable of breeding, eating, sitting, etc.
*pats head* "don't worry my lovely puppy, we will just put aside your evil past and look to the future of making more puppies, eating some juicy meats, and sitting at command.. maybe i'll even get you to roll over!" *wags tail* "you like that idea? yeah! good puppy, your past is behind you" *kisses puppy*
