90 ESSENTIALS OF VETERINARY LAW 
erinarian may subject himself to penalties under 
enacted statutes or ordinances. Thus, where a 
local law gives a body or an officer the authority 
to prevent cruelty to animals, and a man has been 
legally ordered not to work a horse, a veterinarian 
who advises the owner that the horse may be 
worked may thereby incur the penalty. That is a 
question of opinion with the veterinarian, but he 
has not the legal authority to decide the question 
of fact. 
