Notes

Savannah monitor care
DIET
Savannahs will eat gut-loaded insects such as crickets, roaches, and earthworms along with appropriately sized rodents. Pinky mice, fuzzies, adult mice, and various sized rats are the usual fare in captivity and the occasional chicken pieces for enrichment.

HOUSING
Even if you plan to get a 5-inch-long hatchling, house it in the largest terrarium you can afford. The lizard’s growth rate largely depends on what and how often you feed it, but a hatchling can easily double in length in just four months and reach adult length in less than three years. Most commercially available aquariums will not meet the space requirements of an adult monitor. Of course, you can start by keeping the young lizard in a small terrarium and move it into larger enclosures as it grows, but small spaces present critical problems with controlling and regulating temperature. recommend a terrarium 8 or 9 feet tall.Links for enclosure:
https://www.customcages.com/hybrid-reptile.html

Illness symptoms
Reptiles do lose moisture by breathing dry air, but this is intentionally done in order to lower body temperature particularly in the brain. This is done by normal breathing, panting, and by taking prolonged breaths with a gaping mouth. These breaths cause moisture in the airway to evaporate which lowers the body temperature. This is done only when the animal has warmed past their threshold. When the body temperature of the reptile reaches excessive levels the animal will start respiratory cooling, however if dehydrated the reptile will not start respiratory cooling until higher body temperatures are reached. The more severe the dehydration the higher the temperature the reptile will endure before starting respiratory cooling. In some cases this can be lethal by the reptile overheating. The start of this is the animal acting strangely, spasms, and elevated heart rate. In short, yes reptiles (savannah monitors) do lose moisture by evaporation, but this is necessary for them to regulate body temperature and in particular temperature of the brain.