Hi, I just recently got a dwarf puffer myself. Unfortunately it he didn't live very long. My research said this often happens. They are very sensitive to things and I think my found driftwood led
to his demise. I plan on getting another one after I recycle the tank. I had ramshorn snails in his tank and he ate them. I found several cracked and dead ones under the driftwood. Looked like he tackled even the grown snails. There is a puffer form that has lots of great info and advice plus a forum. Here is the link The Puffer Forum • View forum - Freshwater Puffers
Most dwarf puffers are wild caught and will not eat freeze dried or other prepared food. I was told to get frozen blood worms to feed him. I never got that far though. I was also told that most puffers take a while to learn to eat offered food. They are used to hunting. You need to feed them blood worms or frozen, raw shrimp pieces to make sure they get the proper nutrition. They will not eat freeze dried worms. I also set up an earthworm colony to feed mine. I was told that earth worms are good for them if they will eat them. Check out the puffer forum for lots of suggestions on feeding and care.