bearded dragon fat belly

Is my Bearded Dragon Fat or Skinny? 5 easy steps to lose weight

So many pet bearded dragons are fat that it is becoming the ‘norm’. Overweight reptiles are open to serious health issues. How fat is too fat? There is no safe zone in the fat range.

How do I know if my Bearded Dragon is too Fat?

You know your bearded dragon is fat if:

  • It has a thick tail base,
  • The spine and ribs cannot be felt,
  • Distended abdomen and jowls are quite noticeable,
  • Fat pockets behind their arms will bulge, and
  • The fat pads can be easily felt.
bearded dragon head fat pads skinny or fat
The fat pads on bearded dragons heads are one of the clues to assess the reptiles body condition. The curving of the head occurs due to the fat pads and the bulge may feel squishy. Bulging is not necessarily a sign of being fat but indentation is a sign of thinness to emancipation as the fat pads are reduced.

Problems with being overweight include:

  • Dystocia,
  • Shortened lifespan, and
  • Organ dysfunction.

Fat bearded dragons are no accident, this is something that has built up over time. Influencers on becoming overweight include:

  • Excessive food coupled with reduced energy expenditure (Benn et al, 2019).
  • Diets that have not accounted for low metabolic rate or high conversion efficiencies (Benn et al, 2019). It is the general rule that reptiles as a whole have 10% of the energy requirements as that of mammals (Voe 2014).
  • Inadequate thermal gradient that does not enable the bearded dragon to move from high temperatures to lower temperatures as it needs and/or night time temperatures being maintained too high both of which can increase the demand for food.
  • Consistent or frequent high temperatures above their optimal temperature zone
  • Not providing conditions that encourage brumation (Mans et al 2014, Boyer 2015).
  • Stress (Benn et al, 2019).

Baby and juvenile bearded dragons being fed excessive calories will grow rapidly (Stahl and Donoghue 2010).

We tend to see rapid growth as a mark of being an excellent keeper, however in turtles it has been demonstrated there are detrimental effects.

In turtles rapid growth has been attributed to early sexual maturity and aggression (Jackson et al, as cited in Thompson, 2016). In addition, it can lead to mineral imbalances that may be fatal and cause skeletal and shell deformities (Jackson et al, and Highfield, as cited in Thompson, 2016)

bearded dragon fat, overweight
Fat bearded dragons are vulnerable to health risks.

Wild Environment Vs Captivity and Impact on Weight

It it totally understandable if you feel bad putting your bearded dragon on a weight loss program, but allowing them to be fat is misplaced affection. We have an emotional attachment to our pets and we often relate the word ‘diet’ to meaning we will be depriving them of something. So let’s switch this around.

In the wild, bearded dragons are not fat. For juveniles a reasonable sized insect can be an entire meal (Wotherspoon and Burgin 2016) and it takes energy to be spent to get the food. They adjust their diet according to their age, gender and size. For example, a large male can be pretty much herbivorous (Wotherspoon and Burgin 2016) and he will likely spend energy patrolling his territory.

Bearded dragons also brumate in the wild. During brumation fat reserves are used.

In captivity we provide them all they can eat in a single sitting, sometimes multiple times a day. They do not have to travel any distance, perhaps a few inches from one side of their habitat to the other. This is a human way of doing things, it will only cause them discomfort and eventually end up seeing that manifest in vet bills.

Bearded dragons are often accused of being lazy, but they are simply doing what all animals are programed to do, conserve energy when it doesn’t need to be spent.

How do I get my bearded dragon to lose weight?

Once your bearded dragon is overweight, with a metabolism slower than us mammals, it will take longer for your bearded dragon to lose weight.

The steps to losing weight below are intended to be combined. Implementing more than one will help your bearded dragon to lose weight faster.

Rapid loss of more than 10% of normal weight is an indicator of illness and needs immediate attention. Consult your veterinarian for advice on obesity and weight loss for your bearded dragon.

fat bearded dragon basking
Overweight bearded dragon basking

How to Help Bearded Dragon to Lose Weight and not feel so bad about it!

Here are 5 easy steps to get your bearded dragon to lose weight that won’t make you feel bad:

  • Slow down how quickly it eats
  • Reduce the volume
  • Change the diet
  • Brumation links to using fat reserves
  • Change the environment

Slow down How Quickly your Bearded Dragon is eating

Putting food in a bowl helps us keep everything that will be consumed in a neat pile, easily accessible. However, bowls modify eating behaviors and it becomes very easy to eat large volumes of food in a short amount of time. Increasing the time it takes to get food in the day restores a normal part of a bearded dragons natural daily activity as it would in the wild.

Don’t use bowls. Stacking food makes feeding time too quick and boredom may set in. We see that and it is easy for us to fill that void with more food.

Use a very large plate (pot plant base will do) to spread food out on, or use other techniques to feed. This is my favourite trick for all animals. The further you can spread it out (within reason) the better.

Another technique for increasing the time your bearded dragon is occupied, in the post on tricks to getting your bearded dragon to eat greens, is hanging bunches of leaves that can be cropped from. This is a more natural behaviour and as such should also provide a more mentally and physically stimulating environment.

Rather than cut vegetables into cubes that can be swallowed without much effort, cut slices that take a little more effort to eat. This is also important in preventing periodontal disease, see the post on bearded dragon teeth and disease.

bearded dragon catching insects
Set up the housing to encourage natural behaviours such as foraging for food or chasing insects.

Note that if you are feeding live insects in the bearded dragons house, don’t leave them in with it after feeding has completed. Some insects can become the predators (like crickets).

Now it takes longer to Eat, Reduce It

Now that the feed is spread out and takes longer to consume, you can cut down the food. By the time it has finished eating it won’t be giving you that look that we interpret as ‘give me more’. If it does, then spread the feed out more so it takes even longer. Ensure your bearded dragon must move around, exert more effort in order to feed.

Age, sex and biological functions all have a role to play in what to eat and how much. Be flexible in the diet. Some days they will need very little, some days they will need more.

Sedentary adults that are not reproducing can be fed every second day while losing weight, at least during winter when they should be eating less. While this isn’t a big stretch for reptiles, be cautious this does not increase stress. Bearded dragons aren’t binge eaters like some reptiles which eat a large meal all at once and don’t need to eat for another week.

Change the diet

Chances are, you are feeding foods with a high fat content. To get your bearded dragon to lose weight, it is a given that foods high in fat and sugar need to be either reduced or taken out of the diet.

Feeders referred to as worms (i.e. mealworms, black soldier fly larvae, etc.) are actually larvae which are high in fat. Heavily reduce the feeding of larvae. Let them turn into beetles which are half the fat and then feed them. On a side note and just as a matter of interest, beef has a higher fat content than mealworms (Finke, cited in Van Huis et al., 2013).

Reduce fruits in the diet and increase the percentage of dark leafy greens, flowers and gut loaded insects (Boyer).

To speed up the weight loss a little more, offer dark leafy greens daily but leave a day or so in between feeding insects and other foods. Alternatively don’t feed at all for a couple of days in a week. Assuming your bearded dragon is healthy outside of being fat (or obese), do not worry if it refuses any foods other than those which have led to the condition in the first case. Sometimes habits take a little while to change and being hungry is a good incentive.

Set up the conditions to allow brumation to occur as it would naturally in the wild. Several studies show that numerous lizards lipids (fatbody reserves) are used in reproduction (vitellogenesis for females and spermiogenesis in males) (Derickson 1976) and during brumation (Boyer 2015; Derickson 1976). Brumation is a time for natural weight loss, when the excess fat is used to support the winter sleep.

Schedule your annual vet check up before brumation. Only healthy bearded dragons free of parasite loads should be brumating.

Environment enrichment makes a difference to weight

Environments that provide enrichment and encourage natural behaviours have been linked to more activity, leaner condition and longer lives. It’s a win for both pet owners and a great addition to the plan to help an overweight bearded dragon lose weight (Rossi 2006). An enriching environment is cheaper than providing manufactured pet accessories and a key to reducing stress. More in the post on environmental enrichment and accessories.

How do i know if my Bearded Dragon is too Skinny

You know your bearded dragon is too skinny if its:

  • Indents behind the eyes may be apparent. This is not consistent. Some thin bearded dragons may not show depressions behind the eyes. However, in the state of emancipation the depressions will be clear as the fat pads have been used up.
  • The head might start to look a little big for the body.
  • There may be loose skin on the body, a dehydrated look.
  • Leg bones, hips, pelvis, skull and ribs may be obvious. If emancipated these would display prominently through the skin.
  • Spine is easy to detect. If emancipated the spine will appear raised.
  • Small muscles, i.e. the thigh and upper arm muscles don’t bulge. As it progresses to emancipation the legs and tail will be quite thin, muscles will not bulge.

If a bearded dragons is thin it will start to use its fat reserves. It is important that it is provided the right nutrition by this point. Once the fat reserves are gone the body will turn to the muscles and they in turn will become degenerated. At this point the bearded dragon would be emaciated.

Bearded dragons can have a poor condition because of poor husbandry practices, stress, poor heating and lighting, incorrect diet and diseases (Stahl and Donoghue 2010).

For a medically qualified assessment of your bearded dragons condition and treatment plan, seek veterinary advice.

References and Further Reading

  1. Benn AL, McLelland DJ, Whittaker AL. A Review of Welfare Assessment Methods in Reptiles, and Preliminary Application of the Welfare Quality®Protocol to the Pygmy Blue-Tongue Skink, Tiliqua adelaidensis, Using Animal-Based Measures. Animals (Basel). 2019;9(1):27. Published 2019 Jan 17. doi:10.3390/ani9010027
  2. Boyer H. T., DVM, DABVP. 2015 Diseases of Bearded Dragons. AV017 Conference Note. (Reptile & Amphibian Practice) Pet Hospital of Penasquitos, San Diego, CA, USA.
  3. Derickson, W. K. 1976. Lipid Storage and Utilization in Reptiles. American Zoological 16:711-723
  4. Mans, Christoph & Braun, Jana. (2014). Update on Common Nutritional Disorders of Captive Reptiles. Veterinary Clinics of North America: Exotic Animal Practice. 17. 369–395. 10.1016/j.cvex.2014.05.002.
  5. Rossi, J. V. 2006. General husbandry and management. In: Mader DR, editor. Reptile medicine and surgery. St Louis: Saunders. p. 25–41.
  6. Stahl, S., and Donoghue, S. Nutrition of Reptiles. In: Hand MS, Thatcher CD, Remillard RL, et al, editors. Small Animal Clinical Nutrition. Topeka (KS): Mark Morris Institute; 2010.
  7. Van Huis A, Van Itterbeeck, Klunder H, Mertens E, Halloran A, Muir G et al. Edible insects: future prospects for food and feed security. FAO Forestry Paper 171. Rome: Food and Agriculture Organization of the United Nations; 2013. http://www.fao.org/docrep/018/i3253e/i3253e.pdf
  8. Voe, R. S. Nutritional Support of Reptile Patients. Vet Clinic Exotic Animals 17 (2014) 249–261 http://dx.doi.org/10.1016/j.cvex.2014.01.009 vetexotic.theclinics.com
  9. Wotherspoon D, Burgin S,. 2016. Sex and ontogenetic dietary shift in Pogona barbata, the Australian eastern bearded dragon. Australian Journal of Zoology 64, 14-20. doi.org/10.1071/ZO15019

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