I'd give him 2 weeks, just to be on the safe side. It won't hurt him to go one more week if he's gone this long without eating.

I have a little 450-500g 2005 female I got from Cue last year. She wouldn't eat well at his house and where he lived, mice weren't readily available(all she eats is mice.. when she wants to). So, she came here, and after 3 weeks alone in a 15qt tub with high heat, she ate 2 mice, I think it was? The week after, the didn't eat, but the following week, she took one mouse. She now takes one mouse every week without fail and is still in that same 15qt tub. She's packing on the grams slowly but surely and is looking good. She's a picky little snit, but I love her

Hopefully his appetite will kick in and he'll be on a nice steady feeding schedule. Make sure that cool side stays up to, mine stay 85 year round in the juvie rack. They like it toasty it seems