One of the characters sees a piebald rabbit, which turns into a gray rabbit when it is picked up. When it is returned to the ground and it runs away it has reverted to the original rabbit.
When Roderick is choking Lord Whitman, he has human hands and arms. However, when they turn around while fighting, Roderick now has hairy animal hands and arms.
The 'bewitched' wild hound wears a collar in some shots and its rabid spittle varies wildly.
The woods are full of rhododendrons, which didn't arrive in the UK until centuries later. And trackers use Alsatian dogs, a breed that only appeared long after this period.
This film is set in the 16th century. But in the first scene, when the girl is branded, she opens her mouth to scream and shows a full set of teeth with amalgam fillings.