You're frog looks like a nice healthy chunky frog! There is no redness to it's belly or anything that is a good sign. I think he is just taking his time getting adjusted. One of the frogs that I just bought from Petco is the same color but he's eating and pooping and even learning to croak!

Was the person you spoke to at the store the same person that sold you the frog? Maybe it's just a matter of this person just not knowing anything. When I exchanged one of my first frogs the sales person was going to put my new frog in a plastic bag and I had to correct her and tell her to give me a small box. They assured me that the other frog was going to be looked after, they have a vet that comes once a week and will check on it. I was worried about that until I found my vet and he told me that he used to be one of those vets.

I'm sorry that your first experience with White's hasn't been so good. They really are great frogs, with lots of spunk and personality (when they are healthy).