female bearded dragons can live a long and healthy life easily without any risk of egg binding. My female is over 4 years old now and she has lain infertile eggs last summer and again this summer without any issues.
The important thing is ensuring egg laying females have a place to lay their eggs in. Signs they are gravid and getting ready to lay eggs is consistent digging or scratching at the bottom of the cage trying to 'dig' through it. When you see this behavior, setting up an egg laying bin will help prevent egg binding.
Most common causes of egg binding is females holding onto their eggs for too long, as they desperately try to find a suitable egg laying site. Or, they have insufficient calcium in their system to really shell the eggs and they end up busting inside. Both common causes are easily prevented by providing a proper diet and husbandry, and having an egg laying bin.
I made an egg laying bin from a 55 L plastic container, about a third filled with washed children's playsand which I mixed with water so it packs down nicely but not so wet it oozed water when squeezed. As an added precaution, I used a big wide plastic bowl I bought at a dollar store (its about 14-16" diameter) I cut/broke a large opening...about a third of the circumference (actually I had cut a smaller opening but accidentally broke off more than I intended, when I was going to use the bowl as a hide for a ball python). This I bury in the sand, making sure sand was underneath the bowl too. I then banked the sand over it and about two thirds of the floor space of the container.
This set up lets my dragon dig a hole and nice 'cave' under the bowl...which makes me feel less worried about any collapse that will bury my dragon LOL. She can comfortably turn around within her nice cave and lay her eggs and rebury them.
It is also possible to just fill the same size container with sand, till about 6" from the lip/top.
For mine, I created a frame out of scape wood I had lying around and cover it with screen. This I just lay over the top of the container and used a clamp lamp to provide some heat for the sand. I use a lower wattage bulb than what I would use in her cage, as I don't want to bake her before she can finish digging a tunnel...and well, the light is alot closer in my setup to her, than it is in the main cage.
You can just put the egg laying cage directly into the main cage...with a ramp leading into it.
The eggs, once she's finished laying, can be tossed...unless you are not 100% certain they are infertile, then probably best to just freeze them over night then toss them, to kill the eggs. Or you can incubate them, if you prefer.
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PHLdyPayne