The tail tells the story
An African fat-tailed gecko wears its condition on its tail. This ground-dwelling gecko stores fat reserves there, so a thick, plump tail means a well-fed animal, and a tail that visibly thins is one of the earliest warnings that feeding, temperatures or health have slipped. Your records should therefore pair a regular weight with a standing note — or a quick photograph — of tail condition taken at the same sitting. Weighed and photographed monthly, the trend is unmistakable; judged by eye alone across six months, the same change creeps past unnoticed. Note the gecko's general body profile too, since a fat tail on a pinched, bony body tells a different story from even condition all over.
Feeding and supplement entries
Log each feed briefly: which insects were offered — crickets, roaches, or worms as occasional variety — how many were taken, and on which days the feeders were dusted with calcium powder. Fat-tails are nocturnal hunters with individual enthusiasm; some stalk eagerly while others wait at the hide entrance, and your notes quickly establish this animal's normal appetite so that a quiet week reads as a mood, an approaching shed, or a genuine change. Record vitamin dusting on its own rhythm too, and write any refusal streak down with the enclosure temperatures beside it — a cool gecko is an unhungry gecko, and the paired entry saves you treating a heating problem as a feeding problem.
Sheds and skin notes
Fat-tailed geckos shed in pieces and eat the skin as they go, so you may only catch the event by its signs: colours dulling for a day or two, then the gecko looking freshly painted overnight, with shed sometimes lingering on the toes. Log the dates you notice a shed and whether the toes cleared cleanly, because retained shed on toes is this species' classic low-level problem and a run of poor sheds points at the humid hide running too dry. Note any soak or shed help you gave. Across a year, the shed entries set beside the humidity notes become the evidence that your setup is right — or the prompt that gets it fixed.
When records point to the vet
Take the file to a reptile vet when the entries show weight falling across two or three monthly checks, the tail thinning despite a steady appetite, food refused across several weeks in correct temperatures, or shed repeatedly stuck on toes and tail tip despite a properly damp hide. A mouth injury from prey, a prolapse, or a gecko that stops emerging at night altogether are not diary matters — those are prompt appointments. Arriving with weights, feeding dates and temperatures written down lets the vet skip the guesswork and start from your animal's own documented baseline.
A small file for a long-lived gecko
These are undemanding geckos that can live well beyond fifteen years, and their care changes slowly — appetite shifts with season and age, setups get rearranged, keepers come and go. A compact, continuous record of weight, tail condition, feeding, dusting and sheds is exactly the file that keeps that care consistent across all of it. Store it with the gecko's origin note and any vet paperwork rather than loose in a drawer. KinsLe's Pet Passport keeps the whole record together in one portable packet, so your fat-tail's quiet history is always to hand.