I'm so glad you're taking him to the vet, a little tug with him in water might just pull that out but best the vet check. No more enemas, I agree with ADHT, they are very wearing on your dragon and can be dangerous to his health.
Here's another list of food with lists of what else they can eat. I've been going back to that list for years. I know the owner that put it together.
www.beautifuldragons.com. Under Nutrition. There's a store, there, too, that has a scale I want to buy, it's guaranteed for life and since I have 5 dragons, I like to keep up with their weights. So much else on there and they're selling hammocks there now, too.
So let us know what the vet says. I think he'll feel much better without that thing hanging out of him. I still think it's a hard urate, I have 2 dragons who have that and I also use pumpkin to move things along. I think it works wonderfully.
So here's the mix I make, similar to yours but I add Carnivore Care for protein and extra vita/min. 1/4 tsp of each of the cares; 1 tsp butternut squash baby food, then liberally sprinkle with bee pollen (I put in alot), some water to make it easier to put in syringe. I mix with a whisk to make it very smooth, then I put in microwave to warm up 15 seconds. My Imp likes it warmed up, silly boy. It will stay fresh in the fridge for 3 days. It's alot like yours, though. Once that think is out of him, he could stand more protein, which is the Carnivore Care.
You are doing such a great job with him, for him to have moved that thing out of his body is wonderful. Keep up the good work and keep us updated, k? Also give him 2 baths a day for now, to prevent dehydration. If you want a recipe to add to the water to add electrolytes, just let me know, that can help with dehydration, if he needs it.