I have ferrets. You can buy special sprays which makes them (and other smelly animals) smell nice. I clean their cages (I gotta bring 'em in at night in the winter) every two or three days, and you don't GOTTA bath them, but they sure like a nice swim every now and again. I find my ferrets just dig in litter, even after they've used it. Don't use stuff like straw. It pokes at their eyes and gives them sinus problems. Use old towels and clothes, preferably not jeans, really tough clothes (like Hard Yakka), stuff with strings (You could cut them off, like I do), or stuff they'll crawl into but have a hard time getting out of. Like socks. Also, you have to desex the girls or they die from hormone build up. Unless your breeding.