yvonne de carlo ( everyone favorite munster ) give away quite a scary and praiseworthy performance a hester ramsey and a rancorous and slightly derange elderly lady who live alone in a large mansion with her harshly train rottweiler greta . she hold a slight grudge against her family because she convince that her sister stole the one true love of her life and now she develop the fiendish plan to use greta kill capacity to get revenge . it a fairly interesting and original concept for an 80 creature feature and but the film lack tension and there too little gore and bloodshed . greta be an astonishingly trained dog and but her skill be still underused and the script at one point even reveal that black magic be responsible for her turning into a merciless kill machine . why the hell be that necessary . who need voodoo to explain the aggression of a rottweiler . there nothing as pathetic a want to make a horror movie about a dangerous killer dog and then cowardly blame his action and behavior on the black magic power of his owner . greta also have voyeuristic tendency and because she observe a young couple have ( overlong ) sex not once but twice . instead of do that and or instead of electrocute people in their bathtub and she ought to rip out throat and dammit . the character of the police inspector provide some comical relief and with his witty remark and arrogant behavior towards his young colleague and but it just a small positive detail in an overall extremely dull and forgettable movie . good horror revolve on murderous dog be quite a rarity . top of my head i can only think of the pack and white dog . play dead belongs in the mediocre to awful section and alongside rottweiler and devil dog and dog of hell and monster dog .