Self Cleaning Litter Box?

[smilingcat]

Wow, dog being more nimble and agile than a cat does present a very unusual and difficult problem.

18 pound cat is BIG!!!
8 pound dog is tiny.

How about a simple door that requires the needed body weight to open.
a door with a hinge on top.
a platform for the animal to open the door also hinged.
and a connecting rod to tie the platform and the door.
a counter weight to keep the door closed if the weight on the platform is below x pounds.

I think this is simple enough in concept.

[Aggie_Ama]

That is a neat concept Smiling Cat. Tortilla is definitely overweight, my vet would like her to get down to 14-15 lb but cats are very difficult to get weight off. She would still be a large cat, they believe she is part Maine Coon and definitely Manx. We tried can food and after awhile she refused to eat. We are very diligent in measuring her food, we'll see what the vet says when she needs shots again.

I also saw this litter box, http://www.petsmart.com/product/inde...ductId=4017038. It looks like enough of a chore Heidi would just ignore it but worried Tortilla is too big.

[Blueberry]

We have one of those. Our current crop of kittens isn't huge yet - but the
"potty" area of that one is a lot smaller than one would expect, so I don't think it would work for an 18lb cat. Our Maine Coon look alike is already big enough that we're going to have to trade it soon. Sucks because it's otherwise really nice.