do you only have the one sully? that is a lot of pumpkin for just one.. I would give him 3-4 pieces a long with dark greens..
He wont eat the grass hay i see in the background until he is much bigger. You can chop it up and sprinkle it over his food.
Yeah I probably put too much in there but I removed it once he went over to nap in his basking spot. He usually gets some organic spring mix and he seemed to really enjoy this treat.