Weight creeps. A cat gaining or losing a few grams a week looks identical in the mirror for months, while illnesses that announce themselves through weight are far easier to address early than late. A home log solves the invisibility problem, but only if every reading is taken identically and written down identically, because a sloppy log produces noise that looks like change and hides change that matters.
One Method, Described Once and Followed Always
Use the carrier method, described here exactly as it should appear in every entry. Place her carrier on the scales, set on hard flooring rather than carpet, with her inside, and record that combined figure. Weigh the empty carrier straight afterwards, subtract it, and the remainder is her weight. The carrier method spares everyone the holding-and-subtracting routine with a squirming cat in your arms, which introduces your own shifting stance into every reading.
Fix the surrounding conditions too: same time of day for every weighing, ideally before breakfast, because a full meal and a full bladder genuinely move a small cat's figure. Weigh monthly for a healthy adult. Weekly weighing invites overreaction to ordinary fluctuation, while quarterly gaps let a real drift run too long between readings.
Five Fields, Every Single Entry
Record exactly these fields each time: date, weight, method, time of day, and notes on appetite or body condition. Method will read carrier method for every entry if the system is working, and that repetition is the point — any future deviation is instantly visible. A real entry looks like this: date, the first Sunday of the month; weight, 4.6 kilograms; method, carrier method; time of day, 8:00 before breakfast; notes on appetite or body condition, eating eagerly, ribs felt easily under a thin fat cover, coat glossy.
Keep all entries in one running list in one place, newest beneath oldest, so the eye travels down a column of weights rather than hunting through scattered notes. Never round readings differently between entries, never mix units, and if the scales are replaced, note that change against the date it happened so a step in the figures is explained.
Reading a Trend Over Weeks
Judge three or four monthly entries together. A figure wobbling slightly around a level average is ordinary adult maintenance and needs no action. A sequence stepping the same direction entry after entry — each month a little lower, or each month a little higher — is a slow trend, and it is exactly what this log exists to reveal, because no individual step looks dramatic enough to mention at a routine visit.
Bring the list, not a verbal summary, when you discuss that drift. A vet reading dated weights alongside your appetite and body-condition notes can judge whether the change fits reduced activity, a food change noted in the same weeks, or something needing investigation. The notes field earns its place here: weight falling while appetite notes say eating eagerly is a very different picture from weight falling alongside picking at food.
When a Fast Change Bypasses the Schedule
The monthly rhythm assumes slowness. A reading that jumps sharply from the previous month, a cat whose body condition visibly changes between weighings, or weight movement paired with new thirst, vomiting, or withdrawal should not wait politely for the next scheduled entry. Phone the vet, report the two most recent dated figures and the accompanying notes, and let the practice decide how quickly she should be seen. Fast change is a symptom; slow change is a trend; the log distinguishes them only if it has been kept faithfully. Filed alongside her vaccination and visit history, that weight list belongs inside a Pet Passport stored with KinsLe for continuity.