Start at dusk, with the tail as your first reading
Leopard geckos wake at dusk, so check then, when the animal is warm from its hide, active, and showing its real colours and posture. Begin with the feature this species is famous for: the tail. It should be plump and smooth, a visible store of health carried behind the body, and your first comparison should be against the gecko's own earlier photos rather than an abstract ideal. A tail that has thinned, wrinkled, or developed a pinched look since the last check reframes everything else you are about to see, because this gecko has been spending reserves while appearing, at a glance, much the same in its hide.
Eyes, toes, and the shed inspection
Move to the head under a bright lamp. Both eyes should open fully, look clear and even, and track a moving insect or finger; an eye habitually kept shut, crusty lids, or visible debris under the lid after a shed needs attention. Then examine every toe on all four feet, the leopard gecko's most consequential small detail. Retained shed collects at the toe tips in pale, tight rings that can strangle circulation, so look for swelling, darkening, missing toes from past episodes, and bands of skin that did not lift with the rest of the shed. A gecko fresh from a good shed, with clean toes and shed skin eaten as usual, passes this section quickly, and the humid hide deserves the credit.
Walking, belly, and vent
Set the gecko on a flat, clean surface and watch it walk toward its hide or a waxworm offered sparingly as a lure. The gait should be even and deliberate, the belly held just clear of the ground, all four legs sharing the work without dragging, favouring, or swollen joints interrupting the line of a limb. Let it walk over the edge of your hand so you can see the belly and vent: the belly should look smooth and unmarked without dark internal-looking patches that are new, redness, or sores, and the vent should be clean and closed, with no swelling, stuck urate material, or protruding tissue. Gently feel the belly of a calm gecko for unusual hard masses while it is supported fully.
Weigh, feed-check, and review the droppings
Weigh the gecko in a small tub on a gram scale and log the number monthly, at the same point in its routine. Then review the recent story: the gecko should be hunting insects with its familiar focused stare and tail-tip quiver, finishing most of what it strikes at, and producing droppings with a dark portion and a white urate in its usual toilet corner. A gecko eating well, shedding cleanly, holding a plump tail, and keeping its weight is passing its checks comprehensively. One that is failing should usually show it in at least two of those four measures at once, which is exactly why the check gathers all of them together.
When the check should send you to a vet
See an exotics vet promptly for a toe darkened or swollen by shed, an eye that will not open, a leg not bearing weight, a prolapse, or a tail thinning alongside appetite loss. Book a routine appointment when sheds keep sticking despite a good humid hide, droppings change persistently, or weight drifts down across two weigh-ins. Bring the weights and shed dates, because leopard gecko concerns are usually trends, not moments. Those trends are ready to show when KinsLe Pet Passport keeps this gecko's check results in a single continuing record.