That was very rude. The best and first advice with a dragon that sick is ALWAYS to see a vet. I totally agree with that advice...
I do think that MBD may be the problem here though. The diet sounds ok right off, well...by ok I mean that it doesn't seem to be high in the wrong types of protein, but there wasn't a lot of info there. The dragon is also VERY small for a year old. In fact it is about as big as a 1 MONTH old dragon. This suggests a lack of calcium absorbtion.
When I worked in the vet clinic we got a lot of dragons that actually looked FAT because their legs and tails had so much reinforcement so that they would support the lizard. Many of these reptiles had jaws that looked like they were abcessing, but it was just extra tissue, the jaws needing support because of the stress of chewing. Many had irregular swellings localized on the legs where there were minor fractures that the body was trying to stablize. Some of the lizards would have supportive tissue on all the legs and arms actually making them look fat and healthy. In these cases the owners had to be convinced that their was a deficiency in the animals diet.
We usually saw gout swellings in the animals joint areas, and not and the tail base. The gout reptiles were always lethargic, and I don't remember any of them that would chase live prey at that point. All of the gout patients had OBVIUOS dietary problems or EXTREME dehydration, we had recently treated them for something else, or they had a hereditary type of gout (but I only remember seeing this in iguanas). The animals we treated for gout usually had an excess of something in the diet that caused the problem, but when the animal was growing it was able to keep up with the excess of protein, but as the animal got older and the growth slowed the protien caught up. But Seven 7-12 crickets? There are greens that could be the culprit, but he didn't say what type of greens.
There is a joint area swelling that is sometimes caused by oversupplementation, but in a year old dragon that has achieved very little growth, its seems unlikly. Even if it has been oversupplemented, it would have grown.
Perhaps he is using a calcium with added phosphorus? That might lead to gout....But what happened to that growth??
But I have definatly seen a great many undersized lizards with swelling in the Pelvis and Limbs. These three factors alone would have the vet getting us ready to treat MBD before the patient even arrived. Many of these dragons actually looked fat and healthy if you just looked at its legs and tail base...on x-rays though it was just a swelling of the brittle bone and the supportive tissue.
Go to a vet, you can get an x-ray to rule ot MBD. You can test the urates for gout..I believe they draw fluid out of the joints and run a simple test. Whatever the case, it needs vet help quick. That is still the best answer. Both gout and MBD will get worse over time, both are fatal.