Can Bearded Dragons Eat Onions?

Bearded Dragons are known to be creatures with complex dietary needs. Bearded Dragons are omnivores lizards, meaning they can feed on both animals such as insects, bugs, and worms, as well as veggies and fruits. However, there are certain types of food items that should take no part in a Dragon’s diet. Since today’s post is about Onions…

Can Bearded Dragons Eat Onions? No. No. No. Bearded Dragons cannot eat Onions. Onions are just WAY to acidic to be fed to Bearded Dragons. These cute, little creatures have a delicate digestive system. Feeding them Onions – in ANY form – can cause serious health issues.

In this article, I will indulge in explaining to you why Onions are BAD for Bearded Dragons. Additionally, I will also share with you a list of other foods – fruits and vegetables – Bearded Dragon cannot eat. Lastly, you will learn how to react if your Dragon mistakenly ingested a forbidden food item, plus you will gain access to a LONG list of foods Dragons can eat so you NEVER run out of options.

Photo by Ylanite Koppens from Pexels

Can Bearded Dragons Eat Onions?

Bearded Dragons cannot eat Onions. That is especially the case with Baby Bearded Dragons since they are still in the growing process and way more sensible than their older counterparts. Feeding Onions to a Baby Bearded Dragon can lead to serious health issues, in some cases even to premature death.

In conclusion, Bearded Dragons cannot eat Onions simply because this food item is just way to acidic for them. Bearded Dragon cannot process the contents found in Onions and can lead to serious health issues in reptile if eaten.

While there are no studies whatsoever on the toxicity of Onions in Reptiles such as Bearded Dragons, Snakes, Leopard Geckos, there is a LOT of information online in regards to how toxic Onions are to other more popular pets such as Dogs and Cats.

Key Takeaway: The compounds found in Onions are highly toxic to Bearded Dragons – or Reptiles in general. Onion consumption is a NO-GO for reptile owners.

Nutritional Value Of Onions

Here’s what nutrients can be found in 100 Grams of Raw Onions:

Nutrients In OnionsAmount
Protein1.1 Grams
Carbs9.3 Grams
Sugar4.2 Grams
Fiber 1.7 Grams
Fat0.1 Grams

Source: HealthLine.comOpens in a new tab.

However, Onions also contain Niacin[B3], Pantothenic Acid [B5], Folate [Folic Acid], which are all acidic compounds that should not make part of any Dragon’s diet.

Additionally, the calcium to phosphorus ratio in Onions is 1:1. Bearded Dragons need to be fed foods that have a calcium to phosphorus ratio of 2:1 or higher. In that specific situation, the calcium to phosphorus ratio in Onions is not as important as the high acidity of this food item.

Lastly, all these factors added together in a single food item is what make Onions a NO-GO for Bearded Dragons.

Accidental Feeding Of Onions [PLUS How To React]

Sometimes, regardless of how careful and responsible you are in the act of feeding your pet lizard, there is always the possibility of feeding Onions accidentally. Le’s assume – for the sake of simplicity – that a friend or relative has fed your dragon Onions without knowing the implications. What should be your NEXT move?

Answering that question is NOT as simple as it may seem, since your reaction should be based on a number of factors such as the age of your dragon, how much onion did he eat, or the overall health situation of your dragon.

Generally, you should be on lookout for any different behavior in your Bearded Dragon, especially from a digestive standpoint. In case you notice any different, strange behavior you should take your pet to the vet as soon as possible.

When it comes to Baby Bearded Dragons, however, regardless of the amount of Onion he/she has ate, you should take your Dragon to the vet immediately, and by immediately I mean RIGHT NOW.

Going further, here’s a list of precautionary steps you can take to avoid any unpleasant situations in the future.

  • Be In Charge Of Your Dragon’s Diet
  • Make a List of NO-GO Foods For Other People That Have Access to Your Dragon and Make Them Aware of Its Dietary Needs

Other Foods Bearded Dragons Can NOT Eat

Apart from Onions, there are a LOT of other food items that can be toxic to Bearded Dragon. Make sure to have a list around your dragon’s cage to ensure you are always aware of these foods and never feed them to your pet. Here’s a list with foods that are particularly toxic/harmful to Bearded Dragons:

  • Avocado [Toxic For Bearded Dragons/Reptiles]
  • Lettuce
  • Fireflies
  • Rhubarb
  • Beet Tops
  • SpinachOpens in a new tab.

You will also want to stay away from any dairy products such as YogurtOpens in a new tab., Milk, Cheese, etc. Reptiles, including Bearded Dragons can’t digest dairy products and may lead to serious health issues if ingested.

List Of Foods Bearded Dragons CAN Eat

Bearded Dragons have complex dietary needs. They are omnivorous creatures, meaning they can eat both animal and plant protein. Here’s a list of foods Bearded Dragon can safely eat.

This list only scratches the surface of what Bearded Dragons can eat, but it is important to remember a few food items they can safely eat as it is important to remember what they can not and should not be fed.


It is their highly alkaline nature that make Onions especially bad for Bearded Dragons. To stay on the safe side of things, you should completely avoid feeding Onions to your Bearded Dragon.

Related Questions

Can Bearded Dragons Eat Green Onions? No. Bearded Dragons cannot eat Green Onions. Any form of Onion should be completely cut off from your Dragon’s diet.

Can Bearded Dragons Eat Spring Onions? No. Bearded Dragons cannot eat Spring Onions as well. Spring Onions are at the end of the day, well, Onions.

Can Bearded Dragons Eat Shallots? No, Bearded Dragons cannot eat Shallots due to their high acidic content that can make Dragons sick or even worse.

Can Bearded Dragons Eat Garlic? No, Bearded Dragon cannot eat Garlic, mostly because for the same reason they cannot eat Onions. Garlic is way to acidic for the digestive system of a Bearded Dragon and can cause serious health issues.

Sorin Trifu

Hi & Welcome to My Blog! My name is Sorin and I'm 26 years old. I've always been a Pet LOVER and I've always enjoyed writing. I had my FIRST Pet when I was 6 years old and ever since then, I've learned a lot about Pets. I'm glad to combine my passion for PETS & WRITING and share with you ALL my knowledge about them.

Recent Content