Hi Leo, can you get hold of wax worms? I feed these to mine when they need to put on a bit of weight, the reptile shop recommended cutting them up but mine have no trouble swallowing them whole. As you have said you would, I'd suggest staying clear of mealworms, I've always been told it's a no go. Mine are spoilt and are used to being hand fed, they also don't see anything if it's on the ground but will leap into the air to take something out of my hand. Or just try and eat my fingers, they are not fussy lol. Also mine go off their food every now and again, what I do if they are not snatching the wax worms is I gently rub the worm on their nose/mouth, they seem to get annoyed, open their mouths and accidentally take the worm in the process. Hope this helps. I started my collection with a rescue just like yours, he unfortunately never put on the weight and frequently wouldn't eat. But I know I gave him a good life for his last year by providing him friends and a nice environment. Hope he does well