The hunt itself is the first health check
A leopard gecko's feeding time opens with its hunting display, and that display grades the gecko before you inspect anything. Drop in the first insect and watch: a well gecko locks its eyes on the prey, stalks with the tail tip raised and quivering, and strikes with a clean snap. Both eyes must be open and aiming — a gecko that strikes short or misses repeatedly may not be seeing the target properly. A gecko that watches the insect walk past without orienting has told you the evening's headline before the bowl checks begin.
Tail, toes, and vent while the gecko is busy eating
While the leopard gecko is occupied hunting, run the body circuit in the good light of the open enclosure. Judge the tail: thick at the base, tapering smoothly, not thinner than last week. Watch the feet as it walks — every toe should land and lift freely, with no pale band of retained shed pinching one, and no toe so swollen it changes the step. Glance at the vent for stuck waste or shed, and at the mouth line for an even close while it chews. Note any insect uneaten and wandering, to be removed rather than left overnight.
The toilet corner and the trampled water dish
A leopard gecko keeps its own bathroom, and feeding time is when you service it. Lift the droppings from the corner the gecko favors, daily, and the rest of the enclosure can go far longer between deep cleans. Check the water dish: leopard geckos walk through shallow dishes and track substrate in, so rinse and refill whenever the water looks gritty. Look inside the moist hide and re-dampen its lining if it has dried, because tonight's digestion and the next shed both depend on that humidity being ready.
Floor heat before insects, every single evening
Check the warm hide's floor temperature before the feeding starts, not after a refusal. A leopard gecko hunts and digests on belly heat, and a heat mat whose thermostat probe has slipped will quietly turn a keen hunter sluggish. Touch-test is not enough — read the probe or gun at the floor inside the hide where the gecko actually lies. Confirm the cool hide is genuinely cooler so the gecko can choose, then release the insects and let the hunt you already graded proceed.
Two flat evenings in a row is the escalation line
One distracted evening is nothing in a leopard gecko's life; two flat, uninterested feeding times in a row, in a warm enclosure, is a pattern worth acting on. Escalate sooner for a thinning tail, shed that stays on the same toes, eyes kept shut in the day hide and at dusk, or a gecko that stops using its toilet corner because it has stopped producing much. Those findings go to a reptile veterinarian with your notes. Recording each evening's hunt quality, toe state, and corner cleaning in KinsLe under Care Teams gives those notes a home, so the second flat evening is recognized as a pattern the moment it happens.