(1) willfully suffers it to go at large; or
(2) keeps it without ordinary care—
and such animal while so at large, or while not kept with ordinary care, kills or seriously injures any human being who has taken all the precautions which the circumstances permitted, or which a reasonable person would ordinarily take in the same situation, shall be fined not more than $100 or imprisoned not more than 180 days, or both.