just buy some bloodworm and stop being so squeamish lol. my 4 ITs were sunken bellied like your fish when i got them. started them on live bloodworm, which is all they would eat. then mixed frozen in with the live and gradually added less live till they were happily on frozen and then started adding bits of shrimp to the worms, for a while they ignored it then one day bang they were right on it. Havnt had so much luck getting them on to pellets, of the 4 only one will eat them... I got them all at around 2 inch long, the pellet eater is now around 7-8 inch and the other 3 that eat solely shrimp/tilapia etc are all 3-4 inch. most fish will eat non live eventually- i had a gar go 2 months without eating before he took his first piece of mussel!