hello, i can hardly remember what i said, is he pooping at all? if he is it might be something totally different and not impactation. can you get some pictures of his stomach at all? anyhow im sure i said something about using vanilla ensure instead of yogurt, and i would maybe give him 1-3 drops of pedialyte a day. i know i splet pdialyte wrong but its the stuff you give babies when they are sick and have diareah which i also spelled wrong. the pedialyte will keep him hydrated better then water, i know its sounds weird but i have asked my biology teacher about it. i also talked to my horses trainer and thats what she said too, horses get impacted too but in in a different way but still similar enough. i had a female gecko whom appeared to be impacted but i knew she wasnt because i never kept her on sand. i took her to the vet and he said he would have to do surgery and we found out that her ovaries were infected and swollen so they had to be removed. anyhow after hand feeding her and surgery for like 2 months she finally started eating again on her own and now she looks beautifull! ive attached a picture of her scar. this is an old picture and she looks 100 times better now. she only weighed like 30grams then, now she weighs70! oh yeah, and shes an african fat tail gecko. the surgery cost $200 US dollars. darn, now that i look i gues i dont have the pic anymore, sorry.