This little gem is sooooo Rifftrax

Black Zoo is a 1963 American horror film directed by Robert Gordon and starring Michael Gough, Jeanne Cooper, Rod Lauren, Virginia Grey, Jerome Cowan, and Elisha Cook, Jr.

Michael Conrad is a private zookeeper who owns Conrad's Animal Kingdom. He leads a cult group who literally worship the animals he tends — especially the big cats: a lion, a lioness, a pair of cheetahs, a tiger, and a black panther; as well as a gorilla. Conrad plays organ music to the animals in his living room, and uses them to kill anyone who gets in his way. Conrad is married to Edna and forces his mute son Carl to assist him.