Pikes are delicate when they are small, so try not to miss any feedings. Need to get it eating el pronto! Mysis shrimp, brine, live blackwords, glass shrimp and guppies are all great mentions. Keep the guppies as a last resort though. Also, you could buy some garlic extract, some LFS sell it, add one drop to the food. It normally enticies eating. Like was stated though, pikes are greedy!