If the dog is going to a pet home and won't be bred I guess I'd wonder what the purpose of it being mandatory is? Is it just for your own info sort of thing so you know how the pups are turning out? In that case I think it'd be a bit much to make it mandatory and make it be on their dime. If you just wanted it for no other reason than for your own records, I don't believe they should have to get it done on a mandatory basis. Just my thoughts!