The Uncanny (1977)
Wilbur Gray visits Frank Richards so he can get his book published. This book Gray has written are about cats. Cats watching everyone and controlling everything. He mentions the stories in the book are all true, and gives three examples. The first involves the murder of a cat-loving old woman who gives her entire fortune in her will to her cats. Not everyone is happy about the wills, but would have to get past the cats to get the the will. The second story is a tale of black magic between two girls and the third story is a tale of murderous revenge... by a cat.