We seem to have solved the problem

Simba spreads out.

After talking to Alison about Simba, we got some great ideas.

It seems like his biggest problem is he is stressed out. It didn't help when Ziggy leapt from the top of the lorikeets cage behind him after he had walked past. He needed to so something to destress. Might not have liked his choice, but it's easy to work around.

This is what we did.

We found out he was allowed to roam free outside at his old place of captivity. So he was used to digging in soil and sand. We rigged up a plastic bag lined cardboard box with some dirt from the back yard. After feeding he was kept in the enclosure for at least 40 minutes. That seems to have worked with the messing where he shouldn't have.

They have also slowed down even more on food intake, so I am guessing they are getting enough to eat now, and will soon be happy healthy kitties.