From my experience the favorite food is nightcrawlers. In fact, I have found that some of my animals’ problems have cleared up when they were switched to nightcrawlers.
For instance, when I first started working with MHDs my females were laying poorly calcified eggs, sort of translucent with white snowflake type spots on them. When I started feeding them nightcrawlers the eggs they produced were nice and white with a chalky feel to them, very well calcified.
Then when I had my fall in 2002 my babies were getting only mealworms and the sitter I had helping me out wasn't dusting them with the supplement like I had told her to do. Most of the babies developed terrible curves in their spines and tails and as this progressed they would choke on their food and suffer to the point that I had to put them down.
This spring I was down to 3 babies from last year that were still hanging on. One looked pretty normal but the other two were really badly deformed. I decided it was time to start feeding them small nightcrawlers. There was no problem getting them to eat the crawlers and after a couple of months the smallest of the ones with the curvature started to straighten up. Her back has just a slight bit of a hump just before the hips but is hardly noticeable now. The larger of the two wasn't showing much change until just recently and although he still has some significant curvature he is now able to hold his head up normally when he is on a perch, before it would drop back against his back. He climbs better and has a healthy appetite. Before they were getting the normal supplements but their condition didn't respond to the powders or the liquid drops either one. It was only after I started them on nightcrawlers that I saw any significant change. I truly believe that nightcrawlers are an important part of their diet.
Second is the superworm. Most of my animals will go nuts for them once in a while. I have found that when I give them regularly they ignore them but when they get them on occasion they love them.
Mine are pretty much like yours with the crickets. They will eat them on occasion but they have to be the largest crickets and they have to be coated with vitamin or calcium dust or they just ignore them. I have pretty good luck getting the babies to eat small crickets but once they get going on the mealworms they seem to lose interest in the crix.
It is quite normal for the MHD to get a bit plump when it starts to feel better. I have also found that the males seem to be a bit leaner than the females who are much rounder around the middle. This isn't to say that she couldn't be gravid but there are other factors that can make them appear to be fat. Could be a full belly, bloat from parasites or treatment for parasites, or could be gravid. I can't say I have ever seen a fat MHD that was fat just from 'FAT'. They seem to be pretty lean animals for the most part.
So, in spite of your vet's opinion, I don't think that crickets should be the mainstay of the MHD's diet. I think that it should be nightcrawlers supplemented with silkworms, superworms, roaches, large crickets, and for the producing female, occasional pinks. I would rate the feeders in the order I have listed them, with the crickets being at the bottom of the list.
If you could find a safe source of grasshoppers they are supposed to be a favorite in the wild. I haven't pursued them as I feel my dragons are doing well with what I am providing.
I'm glad I have been able to help. I love these animals and every one of them that makes it make me feel that what I have spent the last 5 years doing has been worth while.
I'm looking forward to seeing some pics of Morgana.
Thanks!
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Marcia - FroggieB Dragons
www.froggieb.com/MHDHome.html