you can SMELL cats?, I doubt, cats are about the cleanest animals that I know, they always bury the droppings and cover up the urine, Even kittens will, , when a house smells of "Cats" it's because their "Owner" don't empty the litter-tray and wash them out frequently enough, the same with fleas, the owners don't "Treat" them frequently.
Compare them with children, you you blame the child who stank or was covered in fleas, or would you blame the parent, I work with kiRAB and have two beautiful cats share my home and life, I KNOW which are the crueler, and dirtier, both in personal hygiene and habits.
I would LOVE to have more cats, but it would be un-fair to them, I envy people who have enough space for a "Tribe" of cats