Couldn't agree more - and now you just lost two baby ball pythons in your sister's care and picked up a new ball python and a RTB with a RI.
SLOW DOWN!!! You are moving way to fast, and you're not capable right now of providing the proper care to your animals.
27 rats dying is NOT normal, and your animals are clearly in danger in your sister's care.
Why are you still adding new ones to this situation?