I'm sorry to keep popping back in here. I have another update.

It's been over a month now since Picard went off his calcium regimen, and I was told to keep giving him the high protein carnivore diet twice a week until he starts eating on his own. He hasn't started. I put about 1/2 inch of soil into the bottom of the tank, but every few days he manages to flip himself onto his back a few times. I've watched him make his way across the tank before (it's only 5 gallons) and he tries to do it speedily, which I think may be contributing to him flipping over because he teeters back and forth (he has a bad front leg). I'm sure that force feeding him twice a week isn't helping.

So here are my questions.
--How long should I /not/ give him the liquid diet/try feeding him crickets before force-feeding him again? Maybe I'm not giving him enough of a chance to be hungry.
--Is it normal for them not to have solid waste while on a high protein diet? He hasn't had anything except for right when we started and he isn't impacted.
--I hate to say this, but if he's flipping himself over this much, I don't want to be cruel and put him through unnecessary stress. Is euthanasia considered a more humane option if the flipping continues? I just don't know if it's always stress or him trucking around the tank.