It is unfortunate that animals have to suffer due to the irresponsibility of humans. Pet owners should be held responsible and accountable for the care and actions of their pets.
If a caretaker will not follow your instructions when you put your dog in his care, then you should not put your dog in that situation or get another caretaker that will follow your instructions.
A recent incident happened in Rhode Island where a ladies two dogs attacked a reporter. The lady owner was charged with felony assault. Having a felony on your record is definitely holding the owner responsible and accountable.