Experiment failed; changing methodology

Well, the Litter Kwitter is a loss. It's three-stage, going from amber where there is a hole surrounded by a rim of litter about four inches wide directly to green where the rim is about an inch, inch and a half wide with a hole large enough for a human to use. This is simply too large a jump. The cats are happy to use the amber tray but the green one had them crying out of sheer confusion.

Lalat in particular will sit and pee directly into the hole in the amber tray, leaving the litter clean. Ivan pees in the litter but poops right into the water.

So I've ordered the City Kitty, which is the same kind of system, but with five stages instead of only three. Even if I never get them to 100% litter-free, using less litter would be a big step forward. Our two are young though, so I'm going to keep up hope that they'll be potty trained before the end of the year.