Weight Records and Routine Tracking: Two Minutes a Week

This is the highest return-on-effort item in the whole set of guides: two minutes a week buys you weeks of advance warning.

Most people do not keep records because it seems tedious and unnecessary. Then the moment arrives — a vet asks “when did it start losing weight?” — and the only available answer is “recently, I think”.

1. Why weight is the best indicator

It is objective. “Looks thinner” is affected by lighting, angle and what you expect to see. A number is not.

It leads. Weight loss typically appears weeks before any visible symptom.

It is cheap. A kitchen scale accurate to 1 g costs very little and suits most exotics.

It communicates. You can hand a vet a column of numbers, which beats any adjective.

2. How to weigh

Tool: a digital kitchen scale (1 g resolution). For very small animals, a 0.1 g jeweller’s scale.

Method: tare a fixed container (a plastic tub or box) to zero, then put the animal in. It cannot wander off and the reading settles.

Timing: comparability depends on consistent conditions —

Always weigh before feeding, so food weight does not interfere
Same day each week
After defecation is more accurate

Frequency:

Stage	Frequency
Juveniles, growth phase	Weekly
Healthy adults	Fortnightly to monthly
During a fast (e.g. ball python)	Weekly
Ill or recovering	Weekly, or as the vet advises

3. What to record

One line is enough. Do not over-engineer it:

Date     Weight  Fed          Waste   Warm/Cool   Notes
──────────────────────────────────────────────────────
09-01    62 g    6 crickets   normal  32/25       normal
09-08    63 g    6 crickets   normal  32/25       going into shed
09-15    61 g    refused      normal  32/25       shed complete
09-22    62 g    5 crickets   normal  31/25       normal

The core five:

Weight
Feeding — what, how much, any refusal
Droppings — normal or not
Temperature and humidity — warm side and cool side at minimum
Notes — sheds, moults, behaviour changes, equipment adjustments

Also photograph the animal monthly from the same angle. Gradual shifts in body condition and colour are nearly invisible day to day and obvious side by side.

4. Reading the data

Normal variation versus a warning

Within ±5% week to week → normal, driven by feeding and defecation
Declining for 2-3 consecutive weeks → pay attention
More than 10% cumulative loss → see a vet
Fasting but weight stable → usually needs no intervention, especially a ball python in autumn or winter
Eating normally but still losing weight → a warning sign, commonly parasitic

Read it alongside the rest:

A drop in weight next to “warm side fell from 32 to 28” points the answer at the equipment rather than the animal. That is precisely why temperature belongs in the same record.

5. What else to log

Equipment maintenance (updated only every few months, but important):

UVB tube replacement date — the easiest to forget and among the most consequential. A lit tube is not necessarily emitting UVB
Thermostat calibration date
Full substrate change date
Filter media change date (aquatic)

Sticking a dated label directly on the UVB tube is the simplest reliable version of this.

Veterinary records:

Date, symptoms, diagnosis, medication
What the vet actually said, in their words
Next appointment

Exotic illnesses often recur or turn chronic, and a complete history is genuinely valuable for later diagnosis.

6. What to record it in

Phone notes: lowest barrier. If you will actually stick with it, fine.

A spreadsheet (Excel, Google Sheets, Numbers): recommended. It plots the weight curve automatically and the trend becomes visible at a glance.

A paper notebook beside the enclosure: especially effective with several animals — you write it as you pass, without reaching for a phone.

The tool does not matter; consistency does. Pick a place and a format you will encounter every week.

7. With several animals

Past three animals, memory stops being reliable:

One row or page per animal, numbered or named
Write which animal in every entry, not just “the gecko”
Mark quarantined animals separately, with start and end dates
Log equipment maintenance per enclosure, not per animal

8. A realistic suggestion

If this all feels like too much — just record weight.

One column of dates, one of numbers, two minutes a week. That single item already captures most of the early-warning value.