I have a question... or a couple, rather. For those of you who have more than three cats- how is your litter box set up? One litter box, two, more? We just got two more cats, and don't know what to do about the litter. We have six cats total now, and the smell is becoming a bother. Any tips? What about those mechanical litter boxex.. anybody have experiece with those? Thanks for any responses, I'd reallllllllllly appreciate it. Good day!