The basic facts about the animal
Start with identity: the species — savannah, Nile, Asian water monitor and the rest differ a great deal — plus age if known, sex if known, length and recent weight, and how long the monitor has been with you. Say where the animal came from: breeder, shop, or a rescue or rehoming, and anything known about its life before you. List previous health problems, vet visits and treatments, and whether the monitor is housed alone or has any contact with other reptiles. These basics shape every decision that follows, because a concern that is minor in a young, fast-growing monitor reads differently in an elderly one, and a vet who has never seen the animal has no baseline unless you supply it.
Describing the concern so it can be triaged
The most useful thing you can give a vet on the phone is a precise description of the change. Name what you have noticed — appetite loss, a swelling, a limp, discharge from the nose or mouth, a change in droppings, unusual lethargy, a skin problem — and when each sign started, whether it is constant or comes and goes, and whether it is getting worse. Mention anything that changed just before: a new food item, a dropped feed, a scuffle, a recent shed, a move to a new enclosure. Take clear photos or a short video of the sign if it is visible; a monitor's breathing or gait is far easier to judge from footage than from an owner's description. Write the timeline down before you dial, so nerves do not compress a week of signs into a vague 'he has been off for a bit'.
Enclosure and feeding information
Monitors are products of their enclosures, so gather the setup numbers: hot-spot and cool-end temperatures, humidity, the size of the enclosure, substrate type and depth — many monitors need deep substrate to dig — water provision for drinking and soaking, and when the enclosure was last cleaned. Then the feeding record: what has been offered over the last few weeks, how much, how often, what was actually eaten, and the date of the last accepted feed and last droppings. A monitor refusing food is a very different call depending on whether the last feed was three days or three weeks ago. Supplements and how they are given belong in the same list. Having the numbers in front of you keeps the call factual instead of a series of estimates the vet then has to discount.
Handling, transport and the plan
Because monitors are big and powerful, the vet may ask how you would get the animal in: whether it can be handled safely, its temperament when unwell, and what container or vehicle you have. Be honest — a sick monitor that cannot be safely boxed at home changes the plan, and practices would rather know before you arrive with an animal you are struggling to hold. Ask what to bring: a fresh droppings sample is commonly requested, plus photos of the enclosure. Note the name of the person you spoke to and exactly what they advised, including how urgently to come in. Keeping all of this in your monitor's KinsLe Pet Passport means the next call — to your usual vet or an emergency clinic — starts from the same complete page.