I have not yet weighed him, but plan to maybe next week. He was initially quite fearful of me handling him, so I wanted to give him extra time to settle in. But, as evidenced in these photos, he loves to explore just outside of his quarantine tub. Today, he was totally fine with me picking him up to redirect him away from the floor (and also chooses to be near me when I sit next to the tub), so I think we'll make enough progress for me to weigh him soon.
When he refused his food last, he did go right up and smell the mouse (I think I got "small adult" mice--defrosted and then heated with a hair drier to 98 F), but didn't seem interested enough to eat it. I left it in his enclosure overnight as well, thinking perhaps he was drop-fed previously. I thought maybe it was stress related, but he could have just been not hungry. The day I got him, he pooped, and then again a few days later, so I think he likely ate just a few days before arriving to me.