Does anyone know the name of an old movie, I am guessing 1940-50 that used to play sometimes during the 1970's. It is about 2 old women who run a dance school of some sort. One has lots of pet rabbits and she goes crazy and kills the rabbits and I think her sister as well.

It appears to be What's the Matter with Helen? from 1971.

That's the movie, thanks a lot!