The Fly (1986)

In this deleted scene from David Cronenberg's remake of "The Fly", Seth Brundle (Jeff Goldblum) uses his teleporter to fuse a cat with a baboon. The results are tragically predictable.

The Fly (1958)

Tom

Tom the factory cat begins the movie by meowing as he runs towards the nightwatchman's office. Gaston (Torben Meyer) picks him up and says, "Ah, M'sieur Tom, mon cher. You are late c'est soir. Still looking for your girlfiend, huh? Mam'selle Dandelo has found another. You will never see her again."

Dandelo

Obsessed scientist Andre Delambre (David Hedison) hasn't quite perfected his teleporter when he tries to disintegrate and reintegrate his pet. Dandelo's “stream of cat atoms” disappear into space, but she can still be heard spookily meowing.

"It'd be funny if life weren't so sacred." is Andre Delambre's later response.

I think you'll agree that Andre deserves everything that happens to him after that.