At 6 months they are usually 400-600 grams. They don't usually go off feed at that age unless there is an issue with their husbandry. How does his set-up look? I move my BP's up in bin size if they stop eating when their younger, and/or I assess their heat and humidity levels to see if there is an issue there. 2 months isn't usually a big deal but for a BP that age I wouldn't be comfortable if they went off feed for more than that.