My Mom Has 6 Cats, And 6 Litter Boxes, One

my mom has 6 cats, and 6 litter boxes, one in each room of her home. Thus, she eats/sleeps/lives with litter boxes. She rarely opens any windows, not sure exactly why. Recently she started not feeling well, shortness of breath and fatigue being the main issues. She has been to a cardio doc, and had tests, no arteries blocked, etc. Its on the books as idiopathic for the moment. I do not think she has told the doc about how she lives, and the litter box in every room of her house concerns me. Could this perhaps be meaningful (the litter boxes)? YYYY@YYYY