Temps are 89/80, Humidity around 60%, in a shoebox size tote in a rack. Exactly the same conditions as 2 others babies in his row on the rack.
I tried dangling the rat in front of him a few times, but no interest. I ended up contacting the breeder I got him from, and he suggested an assisted feed, which I did, and it worked. We'll see next week if he'll take one on his own.
Makes me very grateful for the good feeders.