It's inhumane to ignore the needs of a pet.
Sandra is a stay at home mother who is burnt out from taking care of the kids and the family cat needs their little box changed urgently.
Sandra wants to rest and avoid having to do anything else.
Sandra pays one of the kids extra allowance to clean the litter box.
Sandra lets the litter box go another day without cleaning it, so she can lay down.
Sandra's cat gets to use a clean box and is healthier.
Sandra's cat refuses to use the dirty box and gets a bladder infection.