porcupine puffer glass surfing/not eating

[porcpuffer124]

recently purchased a baby porcupine puffer thats about maybe 2 inches on monday. i currently do not own a QT tank so he went right into my DT. he looked fine with no visible white spot or illness. the whole time hes been in there, hes been glass surfing, while switching sides of the tank over night. The entire 3 days hes been in there hes swam around the rockwork once. Along with the glass surfing, hes also rejected shrimp and clams on the half shell with garlic. So im a bit lost to say the least, and looking for a bit of advice, ive heard that its common for them to glass surf but there also so eager to eat so it makes me a bit concerned. Hes opened his mouth quite a bit so i think that rules out lockjaw. His tankmates are also non aggressive, and hes currently in a 150 gal FOWLR.

[Pufferpunk]

I'm sorry it's taken me so long to answer you! There was a glitch in the Security settings here & I couldn't post.
How is he doing now?