Every two weeks for a very small senior
An elderly crested gecko should be weighed about every two weeks, with a gentle check-over in the same session. The fortnight matters because a crested gecko weighs so little to begin with: a drop that would be rounding error in a bearded dragon can be a serious fraction of this gecko's body. Weekly weighing adds handling stress without adding much insight, while waiting a month lets a slow slide run too long. Weigh in the early evening as the gecko wakes, placing it in a small, ventilated tub on a gram scale rather than trying to balance it on an open platform it wants to leap from.
Grip and climb are part of the weigh-in
Grip and climb are part of the check for an elderly crested gecko because this arboreal species announces aging through its feet and confidence as much as its weight. A gecko in good condition walks up glass and bark with its toe pads gripping cleanly and jumps between perches without hesitation. An older gecko that starts slipping on surfaces it used to scale, or that stays low and hugs one branch all night, is showing you reduced strength or sore joints alongside any weight change. Let the gecko walk onto your hand and across a textured branch during the check, and note honestly whether the movement matches last month's ease.
Skin, tail, and hydration in the same look
Skin, tail, and hydration belong in an elderly crested gecko's check because they change quietly. Look for shed that lingers on the toes, which can constrict them, and for skin that stays wrinkled long after the evening misting, which suggests the gecko is not drinking or licking droplets as it should. If your gecko still has its tail, it should look full rather than pinched; if the tail was dropped long ago, watch the hips and the base of the spine instead. Check that the eyes look full and clear rather than sunken, and that the crest and body color fire up and down normally across the night.
Food interest as a fortnightly measure
Food interest works as a fortnightly measure for an elderly crested gecko because appetite often fades before weight does. Note how quickly the gecko finds its prepared diet, how much is gone by morning, and whether it still snaps at the occasional live insect with its old aim. An older gecko may naturally eat a little less and move a little less, but a clear step down, food ignored two offerings running, lick marks absent from a fresh dish, deserves a note with a date. Pairing those appetite notes with the weights stops you mistaking a temporary dip during a shed or a warm spell for a lasting decline, or the reverse.
When a small gecko's numbers call for help
A small gecko's numbers call for help when the fortnightly weight falls twice in a row, when toes carry stuck shed that will not shift after misting, or when the gecko stops climbing and sits on the enclosure floor. Sunken eyes, a visibly thinning tail, or a gecko too weak to grip a finger are reasons to contact a reptile vet promptly rather than waiting for the next weigh-in. Bring the dated weights and appetite notes, since grams and dates persuade better than impressions. Recording them in KinsLe Pet Passport keeps your crested gecko's tiny but telling trend in one place.