Fun fact, they used to sell capsules with tapeworm eggs inside for weight lose. One pill had the tape worm egg, and another had a dewormer. You took the dewormer when you felt you had lost enough weight.
We didn't adopt a cat we captured outside when we gave him a litter box and he let out a 10+ second wail (and not the vocal kind) which left my wife and I doubled over laughing till we doubled over gagging from the foulest smelling... deposit ever with white squirmies on top. nope nope nope.