As previously stated this should be decided at the time of purchase. Reputable breeders make provision for this and will usually accept the dog back into their homes, or help provide prompt assistance in locating a suitable new situation for the dog. If you have done a poor job in socializing your dog and he has bad behavioral issues, usually the breeder will help, but don’t expect to just “dump” the dog in the breeders lap. Too often owners create behavioral problems and then expect a conscientious breeder to bail them out.