Ok, I’ll get him some salad. I’ll take some measurements too.What is his weight and length? Pictures can be deceiving.
His fat stores in his tail and head aren't depleted, so he isn't at an unhealthy low weight. Some dragons, especially the males, are more slim built like that. Based on the pictures alone, I'd say he looks to be a healthy weight.
You do need to get him eating salads though. Salads provide a lot of needed nutrients that are required for your dragons good health and weight.
-Brandon