Jackson's Chameleon Feeding: Three Insects Every Other Day, and the Supplement That Causes Edema

A Jackson's chameleon eats less than most keepers expect and tolerates less supplement than any lizard on this scale, and the two mistakes that fill the health guide, gout and edema, both come from the food. Here is the schedule by age, the two sizing rules, the light supplement rhythm, and the water that has to come first.

Feeding Schedule by Age

Two sizing rules hold at every age. No insect is larger than the space between the chameleon's eyes, and no feeding goes past five to seven insects. The adult figure of three every other day comes from a chameleon-specialist protocol and the five-to-seven ceiling from the hobby's standard care sheet, and they are not in conflict: three is the target for a settled adult, seven the most a feeding should ever be. An adult Jackson's that gets seven every day is on the road to gout.

What Jackson's Chameleons Eat

Live, gut-loaded insects, varied. Crickets, roaches, silkworms, grasshoppers, house flies and small snails are the core, with mealworms, superworms, butterworms and wax worms as occasional richer items, and pesticide-free slugs, caterpillars, sowbugs and spiders where you can get them. Variety is the diet; a chameleon on crickets alone is on a poor one.

Gut-load, because the cricket is the meal. What the insect ate in the two days before is what the chameleon gets, and a well-fed insect is also a wet one, which for a species that hydrates partly through its food is not a small thing. The gut-loading guide covers the feeder diet.

Let it hunt. Free-range feeding, insects released into the planted enclosure for the chameleon to stalk, is the preferred method, since the hunt is the exercise a chameleon gets. A plastic feeding dish under a branch works for a keeper who needs to count what went in, and for the pregnant female whose intake matters.

Supplement lightly. This is where a Jackson's differs from a veiled or a bearded dragon. The veterinary sheet's schedule for an adult on a non-breeding diet is plain calcium carbonate or gluconate dusted once weekly, and a general vitamin and mineral supplement once weekly, with a calcium-to-phosphorus ratio of at least 2:1 in what the animal eats. The specialist protocol dusts plain calcium at every feeding on a growing animal, and that is the rhythm for a juvenile under a year, when bone is being built; an adult drops to the weekly schedule. Either way the calcium is D3-free, and the vitamin product carries no more than 100,000 IU of vitamin A and 10,000 IU of vitamin D3 per pound. Products high in vitamin D reach toxicity in this species, and synthetic vitamin A is the ingredient most often behind the swelling below.

Foods to Avoid

Anything wider than the eyes. Daily supplementation of any kind. Vitamin products built for a desert lizard, which carry the vitamin D a montane chameleon cannot handle. Wild insects from anywhere sprayed, and fireflies, which are toxic. A dish of standing water, which a Jackson's will not recognize and which grows bacteria in a humid enclosure. And feeding a chameleon that has not drunk.

The Two Diseases That Come From the Food

Edema. A Jackson's with a swollen throat, a puffy neck, or fluid under the skin of the limbs is showing the species' signature reaction to a supplement imbalance. The specialist protocol's finding is that the swelling comes from an imbalance rather than any single ingredient, with oversupplementation the most likely major factor, and the veterinary sheet names excess vitamin A as the one the species is particularly sensitive to. The fix is to stop the vitamin powder, keep the plain calcium light, and let the animal clear it, with a vet visit if the swelling does not begin to fall within a couple of weeks.

Gout. Urate crystals settling in the organs and joints, from too much protein against too little water. A Jackson's fed seven insects a day in a dry enclosure is the case. The stool and urates guide covers the dry, chalky urate that is the early warning, and the fix is fewer insects and more droplets, in that order.

Why Jackson's Chameleons Stop Eating

It has not drunk. The commonest cause by far. A dehydrated chameleon's tongue does not fire, and the animal that seems to have lost interest in food has lost the means to catch it. Mist, wait, and offer again.

Daytime misting is stressing it. Chameleons show stress responses to being sprayed while active. The specialist protocol moves hydration to a night fog or mist, morning dew on the leaves, wet gut-loaded insects, and an afternoon dripper, and leaves the daytime spray alone.

It is too warm. A montane species that lives at 70 to 80°F with a basking spot that never passes the mid-80s stops eating in a room that runs hotter, well before it shows any other sign.

It is gravid. A pregnant female slows down and may refuse in the last days before she gives birth to live young, and her intake goes up, not down, for the weeks before that.

It is in shed, or newly arrived. A few days off food either way.

When to Worry

A chameleon that stops eating for a few days in a cool, well-misted enclosure and drinks when offered is fine. One that refuses for a week, or that refuses with sunken eyes, a swollen throat, a limp, or a soft jaw, sees a reptile vet, and the reptile emergency plan guide sorts those signs by urgency. Jackson's chameleons hide illness until it is advanced, and a week is long for a lizard this size.

Three gut-loaded insects every other day, water first, plain calcium lightly and vitamins rarely. It is a smaller job than most reptile diets, and the discipline it takes is in not doing more.

Sources & Further Reading