When you say temps are right, what are they? Bloods don't like as high of temps as ball pythons, for example. Ambient should be around 80, with a hot spot no higher than 85. I know it's in a tub, but don't see what size. If it's not a 6 qt, I would move it into one. The shoebox size seems too small to a lot of people, but it often gets babies feeding. Be sure the food is warmed, not just room temp. I always offer food in the evening, when they are naturally more active and leave it in overnight if they don't take it right away. If all else fails, I would go ahead and offer a live small adult mouse in the evening. I wouldn't leave it in unattended, though.