I got the puffer about 5 days ago. He is about 5 inches. Up to this point, he has only eaten a few earthworms. The last few days, he has been sluggish. Yesterday, I added Expel-P. Today, he was very active along the front glass. He did not seem interested in earthworms today. I have also tried shrimp, krill, bloodworms, and clams on the half-shell. When I got my Mbu 2 years ago, he was eating within the first day. Once he ate for the first time, he was a voracious eater. It seems odd to me that after 5 days, the Cross River puffer still is not eating well. Am I overreacting?