Hello everyone!

I hope I can get some advice on my new pet frog. I just purchased this pacman frog at petco about a week and a half ago. He isn't really eating very well in my opinion. I have to force feed him night crawlers. For the past two days he has been puffed up with or without me holding him. Also when I was holding him I noticed on his right side puff I can see a semi digested night crawler through his skin. Is this normal? I am worried he is sick. The person at petco said that young pacman frogs eat once a day but my frog is such a poor eater - was I miss-informed? Is their a good website that has consistent information that I can read? Thank you!