She has two identical hides, the black plastic type, about 8"x12" footprint. She's uses them often, but also ends up lifting them up and being half in and half out as well. I'm considering making them heavier.
I do have cats, but I've been careful to wash well before handling her. The house of course smells like cats I assume.
How do I judge skinny vs heavy? I know if she's obese she'll have the valley above her spine, but how do I tell slightly underweight?