MBD is a terrible, slow, tortuous way for a bearded dragon to die. Without the right nutrition, their bodies rob their bones of calcium and vitamin D. Slowly the bones become soft and brittle. Seizures can start. Beardies can lose their coordination and muscle tone. They slowly & painfully die.
My first beardie, Nigel, has an underbite because of poor nutrition and lighting when he was young (they had a plant grow light on his tank). My rescue Spike had an underbite too from early malnutrition. I suspect that Midgee's broken tail was brought on by her eating garbage salad mix daily. And now we can all see the severity of Squiggy's MBD. All of these problems were totally & completely & easily preventable!
I showed up at my herp vet months ago with my rescue Spike who had an infection in his toe. Next to me was a teenage boy who had rescued a sickly beardie from his friend's house. This beardie was curled into a sideways ball, his beard was black, and his eyes were closed. I tried to touch him and he had just enough energy left to flail his mouth towards me. I was horrified. I have never, ever seen a beardie *that* sick before. The vet ended up putting the beardie down because he was too far gone to be saved. It broke my heart. That poor beardie suffered needlessly for years before he died.
So how do you prevent MBD? It's actually pretty easy.
1. Get a good UVB light for your tank and keep it fresh. Replace it every 6 to 8 months.
2. Gut load your feeder insects with calcium and dust them with calcium before giving them to your beardie.
3. Offer them a healthy mix of greens-- GOOD greens, not junk greens like spinach & iceberg lettuce.
4. Keep their tank at the right temp. Every beardie needs a basking spot of 90 to 100 degrees with a cooler side of the tank that is around 80 to 90. Beardies digest properly when they are warm enough.
It's really not that hard to prevent MBD. Sadly, most of the beardies I see for sell on our local classifieds have a heat lamp and no UVB. I wish pet stores did more to educate people on the need for UVB in beardies. They will NOT get UVB rays through the windows-- your windows job is to filter out the UVB. They need their own lights.
Light, heat, calcium, & nutrition. It's that easy to keep a beardie healthy and happy.
Here's another article with good MBD info.