I have yet to hear of any real proof superworms can eat themselves out of a living animal of any sort.. they will eat dead animals though...
I did recently have a blue tongue skink get bit by a superworm...the worm somehow got under the skink's tongue before he could kill it, and it bit him... That was when I learned that blue tongue skinks make a pretty loud cry when they are hurting...was able to get the superworm out though..without loosing any fingers.
Now that blue tongue certainly is careful how he eats superworms now...beats them viciously against the sides of the feeding dish now.
So, superworms can bite, but can't eat themselves out of a living animal. Stomach acids kill quite quickly..If not chewed enough to kill the worm, they may bite inside the dragon but they wouldn't live long enough to chew.. Somebody should put an endoscope into a bearded dragon while it eats superworms...and make a video...most stomachs churn and produce more acid when one starts to eat.
Only other way I can see a superworm eating its way out of a bearded dragon is if the worm was still alive and stored in the, for lack of a proper term, the lower throat (dragons tend to pouch food in their throats before swallowing completely...you can notice this when they open their mouths for more food when hand feeding them..you can still see the past meals in their throat, makes me think of a pelican. I suppose the worm could bite through the throat that way, but I think after one bite, the dragon will spit out everything.
But, as just about anything is possible, maybe somewhere many years ago or so very rarely...a reptile is killed by the superworms it ate...but the odds are far far far less than a reptile dying because of impaction caused by ingestion of substrate.
Its about as true as a reptile not growing any bigger than the cage its kept in...(ie your green iguana will stay small if you just leave it in a 20 gal. Never have to buy a bigger cage (for a lizard that on average grows to 4-5' in length...) My theory...it DIES long before it reaches a size where it will be too big for the 20 gal...because of improper husbandry...
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PHLdyPayne
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I knew green iguanas did get big (seen enough pictures to realize that) but every thing else...I didn't know. UVB, cage size, how long they live, moodiness etc. I didn't want to be wrestling with a 5' lizard for bed space LOL. My research also had other benefits. I learned about bearded dragons and found kingsnake.com (actually found kingsnake.ca first, but after that it was easy to find kingsnake.com). Been here ever since..