CP3S said:
If I invited a mouse into my home to keep as a pet, I'd take care of it and feed it just like I would a dog or a cat.
Until she escapes through the water trough in your parrot's old cage. By that point, the rats who live in your rosebush would be, like, halfway done with moving her house over to the safe spot in the field. And your cat won't stop it all because the mouse drugged his food right before you captured her.