First off, you need to get a proper storage container for your insects. Many bugs can easily chew and gnaw through most netting and thin plastics so you will need something stronger to contain them. You can purchase "Critter Keepers" for close to nothing at most pet stores or you can use aquariums or plastic storage bins for insect storage.
Crickets, Roaches, & Locusts
If you're keeping a large number of insects it's probably best to use a large colored plastic storage bin to store them and a small "Critter Keeper" to transfer them when it's time for feeding. You probably want to avoid using containers which are see-through, because many people have insect phobias and you don't want to risk house guests having a panic attack seeing thousands of crickets, roaches, or worms.
Worms & Larvae
Some worms and larvae can escape the plastic containers they arrive in. It is recommended to use a container with thicker plastic so they cannot chew through the air holes as easily.
Where to Store Feeder Insects
Not all feeder insects require the same care instructions, so it's recommended to follow the guidelines from the store/breeder you purchased the insects from. With that being said, there are a few things that apply to all insects.
Temperature - You will want to store your feeder insects in a location with a steady temperature that is within the range specified for them. Keeping your insects at the right temperature will encourage healthy eating and growth, which are both good for your bearded dragon.
Smell / Noise - Insects (such as crickets) can be noisy and smelly. With this in mind you should store them somewhere you cannot hear or smell them. You can also use various air purifiers which remove (not mask) any smells the insects may create.
Feeding & Watering Your Insects
It is recommended to make sure the insects you feed to your bearded dragon are healthy and nutritious. The best way to do this is to feed them with a nutritious meal before you feed them (this is also known as "gut loading"). Most pet stores carry jars of cricket/insect food that both hydrates and feeds the insects. Some owners will also feed their insects with wet lizard pellets.
It is important to never use a water dish to water your insects because they will drown in the bowl. If you're not using cricket food (which hydrates and feeds insects at the same time) you will need to hydrate the feeder insects with raw vegetables, carrots, orange slices, etc.
Many vegetables contain high levels of Vitamin A and while bearded dragons can get vitamin A poisoning, it is generally not caused by overdosing on vegetables. Vegetables contain beta carotene which a bearded dragon's body converts to vitamin A when he/she needs it. If he/she does not need vitamin A then they will simply excrete the beta carotene. So the general rule of thumb is that it is unlikely for a bearded dragon to get vitamin A poisoning from vegetables, simply because the bearded dragon's body can excrete unneeded vitamin A from vegetables.
However, synthetic vitamin A (found in some reptilian multivitamins) cannot be excreted by bearded dragons. This means synthetic vitamin A will cause vitamin A poisoning if the bearded dragon has already had his/her requirements of vitamin A. Moderate to severe vitamin A poisoning occurs when 10,000 IU/kg of synthetic vitamin A is given to a bearded dragon.
Safe Multi-Vitamins Do Exist
The best multivitamin that we have found is Herptivite Multivitamin for Reptiles, because unlike other multivitamins it will not cause vitamin A poisoning. This is because it uses natural vitamin A which cannot poison reptiles, making it extremely healthy and safe for bearded dragons.
Since lettuce is mostly water it is not nutritious for bearded dragons. Because of this it is best to avoid feeding your bearded dragon lettuce or any greens with the word "lettuce" in the name.
Spinach is also another food to avoid. While spinach is healthy, calcium binds easily to it which can make it hard for your bearded dragon to digest.
Insects Captured in the Wild
Never feed your bearded dragon any insects you catch yourself. The insects you catch probably have parasites on them and contain trace amounts of pesticides, both of which can make your bearded dragon sick.
Fireflies or Insects that Glow
If a bug or insect glows in the dark, then do not feed it to your bearded dragon. Even one of these bugs can be lethal to an adult bearded dragon.
Do not feed your bearded dragons avocados. They are toxic, but their toxicity levels are unknown; however, they are deadly for birds.
Iron is more important for baby bearded dragons. If you do have a baby bearded dragon and you are giving him/her Iron supplements, be sure to give it to them sporadically because too much Iron can cause bearded dragon health problems See what health issues are most common in bearded dragons.. Generally, you can give your bearded dragon enough Iron through vegetables and plants.
Bearded dragons also need vitamin A, but they will usually get enough of this from the plants and vegetables in their diet. You want to be careful not to give your dragon too much vitamin a because that can cause vitamin A toxicity Learn about vitamin A overdose in bearded dragons..
As mentioned previously, we highly recommend Herptivite Multivitamin for Reptiles, because it will supply your bearded dragon with vitamin A without the risk of overdosing or making your beardie ill.
Vitamin D3 & Calcium
Vitamin D3 and Calcium are two of the most important vitamins and minerals you need to make sure your bearded dragon gets. It helps with the development of their bones and is important for female dragons that are gravid (carrying eggs). You will have to give your bearded dragon Vitamin D3 and Calcium at the same time, since bearded dragons cannot absorb calcium without vitamin D3.
In the wild, bearded dragons will get most of the vitamin D3 they need from natural sunlight, so the amount of vitamin D3 you give your bearded dragon depends on how much exposure he/she has to natural sunlight (or full spectrum lighting). If your dragon is frequently outside in the sunlight or if your bearded dragon's cage has full spectrum lighting, then you can reduce the dosage by half.
Currently, the highest rated Vitamin D3 and Calcium supplement available is Rep-Cal Reptile Calcium Powder with D3, which is a favorite among reptile breeders and enthusiasts.