Not a great deal you can say about a film where the best acting comes from a dog. Yvonne De Carlo is supposed to be creepy and scary as the evil aunt but she was far more frightening as Lily in the 'Munsters.'
The cops investigating the killing done by the aunt's evil possessed canine seem to have acquired their detective skills from a mail correspondence course from the back of a magazine. It's not surprising that they fail to solve the crimes.
It's left to auntie to be the architect of her own doom when she seriously upsets the pooch. Word of warning: if you have 'Satan's Dog' (as my DVD copy was entitled), never, ever get on it's wrong side as it will all end in tears.....
Dull and boring, poorly acted, a waste of time really. Go watch 'Cujo' or the original 'Hound of the Baskervilles.'