I wouldn't be opposed to feeding tubifex worms initially to get them in good health but start pellet training as soon as possible. In my experience and many others here I'm sure they're easier to get on pellets when they're still "mini." It took me about a week to get my initial 9 on Massivore, I've lost only one since I started the group to unknown causes and recently picked up two more and one is already taking pellets about a week later while the other is very interested. Hope this helps, check out the mini tiger grow out progress thread for additional info on "minis."
