My Yellow-bellied slider will only eat dried shrimp?

I have a baby yellow-bellied slider (between 2-2.5") and ever since I got him, he's only eaten dried shrimp. Every time I try feeding him pellets or even krill, he avoid them. So for the past month or so, I've been feeding him a small handful of shrimp ~3 times a day and he loves them, I'm just worried that it's unhealthy. Is that okay? Or should I continue trying to get him to eat the (aquatic turtle) pellets?