Okla. Stat. tit. 21, § 717

If the owner of a mischievous animal, knowing its propensities, wilfully suffers it to go at large, or keeps it without ordinary care, and such animal, while so at large or not confined, kills any human being who has taken all the precautions which the circumstances permitted, to avoid such animal, the owner is deemed guilty of manslaughter in the second degree, a Class B5 felony offense.