No issues at all...one is kinda skittish still and only eats when I leave the room but the other two woof down NLS and earth worms. I had issues with the 1.25" ones I got...but not being picky...but 4 out of 6 of them bloated and died. I got over confident in feeding I think and gave them 1mm NLS...but wasn't giving them and spurlalina flake. I am guessing they were too small for the 1mm. The big guys get 3mm NLS sinking....