9.1They hydrate by drinking, and only by drinking
Bearded dragons take in water by swallowing it. They don’t absorb it through the skin and they don’t take it up through the vent.
The myth comes from turtles, which genuinely can absorb water through the cloaca. It got generalised across reptiles and it doesn’t hold for lizards.
9.2How much they need
A 450 g adult needs somewhere in the region of 2.5–14 mL of water a day from everything combined. That’s between half a teaspoon and three teaspoons.
The number is small, and that’s the point of this chapter. Most of it should come in the food. A dragon that never visibly drinks isn’t necessarily in trouble. A dragon that never drinks, eats dry feeders and lives at 15% humidity is; and it will show up as a shedding or constipation problem long before anyone calls it dehydration.
9.3Water bowls
Provide one. Not because the dragon will definitely use it, but because an unused bowl costs nothing and a missing bowl removes the option.
- , Medium-sized and shallow; not deep enough to drown in
- , On the cool side, away from the basking lamp
- , Changed daily and properly disinfected. Dragons soak and defecate in water bowls
- , Tap, filtered or spring water is fine. Avoid softened water for the sodium
“They can’t see still water”
This gets used to justify not providing a bowl at all, so it’s worth separating. There’s nothing establishing that dragons physically can’t see standing water. What’s reasonable is that a still, silent dish is a weak signal, wild dragons drink rain and dew, and movement is what reads as water.
Either way the advice is the same. Make the water move where the dragon can see it:
- , Drip water onto the snout with a dropper and let them lick it off
- , Mist the surface of the bowl, or run a finger through it, while they’re watching
- , Pour fresh water in within sight rather than before they wake
- , Offer freshly washed greens still beaded with water
Plenty of dragons learn the bowl after a few of these and use it unprompted for years.
9.4Water from food, the main channel
| Item | Moisture |
|---|---|
| Leafy greens | 85–95% |
| Hornworms | ~85% |
| Crickets, dubia and other roaches | ~65–75% |
| Superworms, waxworms | lowest, and fattiest |
Superworms and waxworms are the worst choice on both counts at once, driest and fattiest. Chapter 4 already limits them to once or twice a week; this is a second reason.
Three things that move the needle:
- 1.Soak the greens. Trim the stem, slice the leaf along the central rib, cover with water and refrigerate for 24–48 hours, then drain and store between paper towels. Hydrates them and keeps them fresh longer.
- 2.Hydrate the feeders. Gut-load for 2–3 days before feeding, with moisture-rich produce. A dry feeder insect is a net drain, the dragon spends water digesting it.
- 3.Hornworms, one or two a week. This is the reason they’re the exception to the treat-insect rule.
Dry diets are a dehydration mechanism, not just poor nutrition. Pellets and freeze-dried feeders remove the biggest water channel the animal has.
9.5Spotting dehydration
| Sign | Stage |
|---|---|
| Dull, lustreless scales | Mild |
| Chalky, dry urates, the most useful daily check | Mild |
| Infrequent defecation, difficult shed | Mild |
| Loose, wrinkled, accordion-like skin | Moderate |
| Sunken eyes | Severe |
| Dry tacky mouth, thick stringy saliva | Severe |
| Lethargy, appetite loss | Severe |
The urates are your daily readout
Urates are the white part passed alongside the feces. Healthy ones are soft, white and semi-solid. Hard, chalky, gritty or absent means dehydration. Yellow or orange is commonly put down to dehydration but is also associated with kidney problems, so persistent discoloration is a vet question.
The skin tent test, and its limits
Pinch a fold of skin on the side of the body and release. Hydrated skin drops straight back; skin that stays tented suggests a deficit.
Morph note. Silkbacks lose water evaporatively at roughly twice the rate of normal-scaled dragons, with leatherbacks in between, scales are a water barrier.[4] Anyone keeping one has to treat hydration as a daily task rather than a background condition.
9.6Getting water into a dehydrated dragon
- 1.Fix the enclosure first. Humidity into range, deeper substrate that holds moisture, a humid hide, a visible water bowl. Without this everything below is temporary.
- 2.Wet the food. Soaked greens, hornworms, properly gut-loaded feeders.
- 3.Drip, don’t squirt. Droplets on the snout to lick off. ⚠ Never squirt water into the mouth, reptiles aspirate easily and aspiration pneumonia is far worse than the dehydration you were treating.
- 4.A short shallow supervised soak. 85–95°F, no deeper than the armpits, 15–20 minutes. You are offering a drink, not administering fluids.
- 5.Vet, for subcutaneous fluids. This is the actual treatment for a genuinely dehydrated animal and it isn’t something to put off.
9.7Shedding, constipation and hydration are one problem
This is the most useful thing in these three chapters.
A dragon with stuck shed, hard chalky urates and infrequent defecation doesn’t have three problems. It has one, and the one is water.
Urates formed by the kidneys are stored in the distal colon, whose job is to reabsorb excess water from waste. In a dehydrated animal the colon is itself dehydrated, so it strips out more water than it should. A solid mass forms and sticks to the colon wall. Now there’s less lubrication and a hard, dried mass that’s difficult to move, and anything else in there dries and adheres the same way.
The shedding side is the same shortage from the other direction: separating old skin from new needs hydrated tissue.
Wright’s 2008 review identifies constipation as one of the two most common disorders of captive bearded dragons, and concludes it is frequently down to insufficient water in the diet and the environment.[2]
So when you see one of the three, check the other two. Fixing the water fixes all three. Treating them separately (a shed spray for the skin, a laxative bath for the gut) treats none of them.