Care, Health and Growth, Crested Geckos, Geckos

Fat Crested Gecko: What To Do When You Have One in 2022?

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by The Pet Engineers


Monitoring the physical appearance of your pet crested gecko may be one of the most important primary duties that you will need to fulfill as a responsible pet owner.

As a pet owner of a crested gecko, you need to be a keen observer.

Unlike dogs or cats, a crested gecko does not always have noticeable ways of expressing distress due to illness – so, you will need to get good at reading the body language of your pet and observing for signs of illness or other problems.

One such problem that can have adverse effects on the health of your crested gecko is of being overweight.

Having an overweight crested gecko will mean that your pet is at risk of health-related issues more than an average normally weighing crested gecko. Here’s what to do when you have a fat crested gecko.

Signs Of An Overweight Crested Gecko

One of the most obvious signs that your pet crested gecko is overweight is that it is visibly chubby.

If your crested gecko seems to have chubby limbs, fat rolls around the neck and head, and a chubby little tummy, then chances are that your crested gecko is overweight.

The sure shot way of knowing the weighing situation of your pet crested gecko, however, is by maintaining a regularly updated record of its weight.

That way, you will be able to monitor any unusual increase in the weight of your pet crested gecko.

Causes For An Overweight Crested Gecko

There are 5 primary causes behind why your pet crested gecko may have become overweight.

Reason 1 – Overfeeding

Are you feeding your crested gecko more often than you need to?

Overfeeding is one of the leading causes of obesity in crested geckos.

A crested gecko does not have to be fed daily. It helps if you adhere to a strict routine of feeding your pet crested gecko and monitor the schedule of feeding using a record book.

Reason 2 – Too Many Treats In One Sitting

We all love our pets dearly, and may even be tempted to pamper them with their favorite foods every day.

However, as responsible pet owners, we must not give in to this temptation as it can do more harm than good in the long run.

Another reason why your pet crested gecko may be getting overweight is that it may be getting too many treats with its meals.

Reason 3 – Lack Of Exercise

Whether it is because the enclosure is too small for your crested gecko, or because your crested gecko is becoming lethargic due to other health-related or behavioral issues, a lack of exercise can also lead to your crested gecko gaining a lot of weight.

overwight crested gecko
Overwight crested gecko

Reason 4 – Imbalance In The Ratio Of Live Food And Fruit Mix

When a crested gecko gets too many insects and less fruit and vegetable mix, it can lead to an increase in weight without significant nutrition in the diet.

While live foods are good to include in your crested gecko’s diet, they don’t have enough nutrients and instead end up being empty calories if not given in a controlled amount.

Reason 5 – More Fatty Insects Being Given

Another reason why your crested gecko may be gaining weight is that the live food that it gets is comprised mostly of insects that have a higher content of fats.

A proper mix of insects that have moderate fat content is necessary to keep the weight of your pet crested gecko in check.

Signs That You Might Be Overfeeding Your Crested Gecko

While it is easy to point out that overfeeding is a leading cause of obesity in crested geckos, how can we figure out if we are overfeeding our pets?

Here are some signs that show you may be overfeeding your pet crested gecko:

  1. Your crested gecko is becoming visibly chubby.
  2. Your crested gecko’s weight has increased unusually.
  3. Your crested gecko is not eating all of the food you’ve given.
  4. Your crested gecko seems to be constipated.
  5. You can see a bulge around the tummy of the crested gecko.

What is a Crested Gecko’s Average Weight?

When it comes to monitoring the weight of your pet crested gecko, it may help to know about the average weight of crested geckos according to their age.

The following table will guide you on the weight and age proportions of crested geckos.

Hatchling1.5 – 2 grams2.5 – 3 inches
2 months3 grams3 – 4 inches
3 months4 grams3 – 5 inches
4 months5 grams4 – 6 inches
5 months7 grams4 – 6 inches
6 months9 grams5 – 7 inches
9 months16 – 35 grams6 – 9 inches
12 months35 – 50 grams9 – 16 inches
18 to 24+ months35 – 70 grams9 – 16+ inches
Crested Gecko Average Weight

How To Prevent Your Crested Gecko From Becoming Fat

Here are some simple steps you should take to ensure that your crested gecko does not suffer from obesity:

Have a strict feeding schedule.

Depending on the age of your crested gecko, the feeding frequency will change. The frequency of feeding reduces as your crested gecko grows.

It helps to have a strict feeding schedule to not overfeed your crested gecko.

Have enough enrichment in the enclosure.

This means that you must ensure that the enclosure of the crested gecko is big enough and has enough foliage to allow room for your crested gecko to move around and play.

This physical activity is necessary to maintain the weight of your crested gecko.

Monitor the feeding of insects.

When giving insects to your crested gecko, you need to monitor two things:
One is that you should not be giving too many insects.

You need to maintain a nutritionally advantageous balance between fruit and vegetable mix and live food or canned insects.

Secondly, you need to keep in check that not too many fatty insects or treats are being given to your pet crested gecko.

Have regular health checkups of your crested gecko.

Sometimes, lethargy can be a sign of some underlying behavioral or health-related problems.

Having regular checkups ensures that your crested gecko is getting the right treatment promptly.

In this way, there will be reduced chances of your crested gecko becoming lethargic – and consequently, with all that physical activity, your pet will be keeping itself fit.

Crested gecko’s healthy weight

Treatment For An Overweight Crested Gecko

The following measures will help you bring your crested gecko back to a healthy weight:

  1. Diet control will allow you to gradually reduce the number of fatty foods that your crested gecko is eating.
  2. Foliage and enrichment in the enclosure will allow your crested gecko to have physical activity.
  3. Treating any health-related conditions is pertinent to fight off the lethargy that comes from sickness.


Why Is My Crested Gecko Fat?

Your crested gecko may be fat due to one or more reasons such as overfeeding, including too many treats and fatty insects in the diet, and lack of physical activity either due to the absence of enrichment inside the tank or because of the lethargy that may have set in due to some health-related or behavioral issues.

How Fat Should My Crested Gecko Be?

The average weight of an adult crested gecko should not be out of the range of 35 to 70 grams.

This average weight reduces as you go from an adult crested gecko to a hatchling.

How Do I Get My Crested Gecko To Lose Weight?

Control its diet, bring a gradual decrease in fatty foods, and promote physical activity by providing enrichment and foliage within the tank.

These collective measures will help your crested gecko lose weight.


As cute as a chubby crested gecko may look, being overweight has severe negative impacts on the health of crested geckos.

So, if you notice your crested gecko starting to gain weight unusually, you need to find the root cause behind it and figure out a solution to help your crested gecko come back to a moderately healthy weight.

The Pet Engineers

A team of pet lovers. We have owned various pets over their years. From dogs to reptiles, etc. Our love of pets, strive to us to create up-to-date and accurate helpful guides on pets.

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