You are right on the nose (no pun intended) about probably trying to switch the litter pans around too quickly...(or change their food too quickly, etc, etc, etc)....Stubborn, Stubborn, Stubborn is their motto.

I too worried about my guys not eating enough hay at first. I can't claim any wonderous miracles on this one... I did cut back a little on their fresh veggies in order to try and force them to eat the hay. As I recall I only got so-so results... and then I felt GUILTY about depriving them of their nourishment, BAD, BAD Mom!!!!!

Really, one day they just started eating it on their own, kinda like Mikey in that old Kellogg commercial. Now they will often eat hay before the veggies....go figure. My Daisy was even worse...he would not eat hay at all....but I kept putting it down every day...it took me 2 years but he's finally eating it.

Wish I had a magic answer on this one but I'm afraid I don't.

OH...I wanted to tell you I'm running an experiment with my sifting litter boxes. I've got 3--one has clay litter, one has 1/2 clay and a covering of Care Fresh,and the other is just Care Fresh. I'm trying to see if those stinkers can REALLY tell the difference. it's a little early to draw conclusions and I'm thinking the location of the box is probably a factor as well....