A tegu changes faster than almost any other pet lizard — from a nervous hatchling to a large, intelligent, dog-like adult in a few short years — and its records should be built to keep up. The file that serves a tegu keeper tracks growth while it is rapid, appetite while it swings with the seasons, and temperament while trust is still being built.
Growth and feeding while size is changing
Weigh and measure frequently in the early years and write the figures down together, because tegu growth spurts can be dramatic and a stall is only visible against earlier numbers. Log meals in real detail: whole prey, eggs, fish, fruits, and vegetables offered, what was hunted down eagerly, and what was left. Tegus eat widely, and a dated menu makes it easy to spot a diet quietly narrowing to favourite rich items or a sudden disinterest that began after a specific change.
Record sheds with notes on retained skin around toes and tail, and log soaks and droppings, including whether the tegu passed them in its water bowl, on the substrate, or during a soak outside the enclosure. A tegu that usually sheds cleanly and then struggles twice running has told you something — often about humidity — but only if the earlier clean sheds are on record to compare against.
Brumation, seasons, and enclosure readings
Tegus in many homes slow down or brumate through cooler months, and this is where records earn their keep. Note when appetite faded, when the tegu began sleeping through the day, how long the quiet period lasted, and when normal basking and feeding resumed. Next season, that timeline stops you mistaking an ordinary wind-down for illness — or waving away genuine lethargy as just brumation at the wrong time of year.
Alongside the seasonal notes, log basking temperature, ambient range, and humidity, plus ultraviolet bulb replacement dates. Tegus need real heat to digest those varied meals and steady humidity to shed well, and a behaviour change that lines up with a fading bulb or a dry spell is a husbandry fix, not a mystery. Photograph each enclosure upgrade; a tegu outgrows housing, and dated photos document when space, hides, or substrate depth changed.
Temperament, handling, and vet paperwork
Keep a short handling log: how the tegu responded to being approached, whether it came out willingly, any tail-whipping, gaping, or unusual defensiveness, and how long sessions lasted. Tegus are individuals — some become remarkably social — and a written record shows progress a keeper living with the animal daily can miss, as well as flagging a sudden change in a normally calm animal. Note breeding-season restlessness separately so it is not misread later.
File origin details, estimated age, and every vet summary in the same place. See a vet if a tegu loses weight outside its recorded brumation pattern, stops basking entirely, develops mouth or limb problems, or passes a shed badly several times running, and bring the seasonal log to explain what is and is not normal for this animal. Keeping everything in KinsLe's Pet Passport gathers your tegu's records into one portable packet, ready whenever a vet or covering keeper needs the full picture.