I really recommend against feeding bloodworms, they can cause bloat which can then kill your frog, maybe brine shrimp would make a good subsitute? Also, if you ONLY feed the pellets (or maybe try reptomin sticks), surely your frog will get hungry enough to eat them? I don't think it would starve itself out of stubbornness? I could be wrong though, I'm by no means an expert and hopefully someone more knowledgeable will come along and give a better answer. Hope I helped though