Hi bath him so he poop out the mealies !! also a high baskingspot is needed to digest the mealies wel . 115-110 it must be atleast !!! what is his baskingspot ??
also let a good veterian check him even try to find a vet who is open 24 houre a day . some times if they not grow well they have parasites as well . you give also vitamine ? what kinda dusting you use??? brandname ? bath him shoulder deep and feel with youre wrist if its not to hott. then 15-20 min in water and ad warm when it cool of to much . most of time they wil poop. mealie press inside his spinal cord that why he moving weird !! goodluck i hope he poop ,btw never give mealies they r a bad prey item. byeeeeeeeeee