Well, whoever came up with the idea of donating a pet, scam or not, doesn't know enough about placing pets in good homes! What if the highest bidder wanted to cook up the pup and eat it? How could anyone know that the dog was going to a responsible home? Just on your breeder principles, it is good that you said no! But you are surely a responsible dog owner and breeder, and have your pup's best interest at heart!
