You're in for some fuuuuuuuuuuuuun times.

When we got our 2nd cat, we got RID of our littermaid. Or actually, we stored it just in case we ever only had one cat again.

Here's the deal, you're right, a cat will use the CLEANEST box, thus, will always use the Littermaid. This causes the receptacle to get full FAST!!! With as many cats as you have, you'll be dumping or changing those babies multiple times a day because I'm guessing that that's the only box they'll be using! And this is just my guess, from experience.

There is one possibility . . . if you got a small Littermaid, or regardless, it doesn't really matter which size, it doesn't hold as much litter so if you've got a cat that likes room or likes to dig to China, they may decide to use one of the bigger boxes.

Oh, and by the way, the Littermaid isn't perfect . . . doesn't scoop perfectly . . . we always had to scoop out the little pieces that were left behind. If we didn't, they'd smell up the box or get tracked out. You'll find that out for yourself.

Enjoy!

Oh, by the way . . . if your motor starts to get slow, you can buy some kind of amp thing off ebay (I bought one at the end) that speeds it up. That's after you use it for a year or two though. Just a tip.