Is this relocation stress (bearded dragon)?

Last Wednesday (July 2) I purchased a healthy baby bearded dragon from PetSmart. Usually, I would adopt from a rescue, like most of my other pets, but no rescues in my state (that I could find) had a beardie available for adoption. And they were the only one that sold them in town.

The people there were really helpful when it came to the basics (although I do plenty of research otherwise) and he seemed pretty active in the tank with the others, if not a bit tired (we bought him in the late evening) and since then, he's been basking normally and pooping normally, etc. But he hasn't eaten much. The night we brought him home, he ate a few small pieces of watermelon and the next night a bit of broccoli. He didn't eat anything else until Friday evening, when he ate one cricket. And although I provide him with plenty of water in his terrarium, he didn't drink anything (that I saw) until earlier tonight, and that was in a bath.

The temperature in his habitat is usually between 90 degrees F and 105 on the basking side. On the cooler side, it's between 80 and 90. At nighttime, it usually drops down to 70.

He's basking and sleeping regularly, and he also has a tendency to jump from perch to perch, and he runs around plenty, it's just he hasn't eaten as much as he should.

As this is my first reptile since I was 11, I'm not sure about relocation stress and how it affects them. From what I've read, it sounds like it, but I was just making sure. Sorry for the long question!&TY!