Poor Food Choices
Bad Fruits & Veggies
NEVER feed them Spinach under any circumstances it inhibits their calcium absorption. Kale in recent studies has shown to have the same principles as Spinach so to be safe I would say no to that as well. Carrots (which should only be fed shaved or diced) can be fed but only on occasion the same with Bananas (which should only be fed diced into small pieces to avoid getting stuck in the throat). They can also alter a dragons calcium levels which can cause serious health problems.
Just because it is a leafy green does not mean it is a good staple everyday green. The main types of lettuce that are often fed to dragons daily are Iceberg and Romaine. These have little to no nutritional value and are compared to 'eating water'. Don't waste your money, walk a few steps over to another section at the grocery produce department and get Collard, Mustard, Dandelion or Turnip Greens instead.
Not a Super Food for Dragons
Never under any circumstances feed a bearded dragon Avocado. Avocado are toxic to dragons and can even cause death.
Live feeders such as rodents and small lizards should NEVER be fed to Bearded Dragons. Not only is there no valid reason for feeding a live animal to a dragon it can have very harmful effects. Live animals have bones, skin and muscle and do not break down with a few chomps like an insect. Bearded dragons cannot chew as they don't have teeth, only a serrated jaw line, and something this large could cause them to choke. And even if they manage to slowly swallow the animal it is very hard on their digestion and can cause punctures in the stomach and intestine.
Aside from health risks feeding live animals there are no proven health benefits from feeding these to bearded dragons. And sadly it has been shown to make them much more aggressive as they learn other animals can and should be eaten.
Below is the nutrition chart we use from www.BeautifulDragons.com