Ok just a few thing I see that I would suggest. First off the small weight loss was probably the urates. Second I would take some black construction paper and cover the sides and back of the tank. Third if you haven't tried live and he's looking healthy (witch he dose) I would not go to the vet... Another method I use with my pickets eater was a live rat pup in a small Tupperware container over night. This picky eater was born 3/14 and just hit the 250g Mark.now the last month he has not refused a meal. How are you heating the feeder up? Are you sure it is hot enough. And have you ever tried a different substrate ? I have broken 7 month fast by simple changing his tank from paper towel to eco earth. Don't worry so much as they can go a long time with out food. Keep handling sessions to a bare minimum until it eat a few times. And only offer once a week.

Sent from my LGL15G using Tapatalk