I am with Dragon. Place is very unsafe for pets. For the sake of them please make phone calls for them to be picked up ASAP.

Kitten would not die from simply falling down.

Also cats have very thin skin and it's easily infected if bitten by insects/bugs/spider/fleas. Infections are usually not very visible but they can kill a cat. You really can't have cats if you have any kind of infestation of bugs/insects.

Please call someone about your cats today.