The advantage of a notebook that lives where you feed
Most reminder systems fail because they live somewhere you rarely look. A notebook kept with the food supplies has the opposite property: you are beside it twice a day, scoop in hand, thinking about the cats anyway. That daily proximity makes it the ideal place for a slow-moving deadline like an annual checkup, because a due month written there gets glanced at hundreds of times before it arrives. The trick is to structure the notebook so the reminder cannot sink beneath shopping lists and half-finished notes, which is what happens to an unstructured pad within a month.
Give the first pages one job only
Reserve the opening pages of the notebook exclusively for checkup tracking, one block per cat: name, the month the next annual visit is due in large letters, and the practice name. Keep these pages free of everything else. Behind them, the rest of the notebook can be the messy daily log it wants to be, food amounts, appetite changes, a hairball week, a new treat that disagreed with someone. When you open the cover to log a feeding observation, the due months are the first thing your eye crosses, and a cat entering her due season registers without any deliberate checking routine on your part.
Write the visit up while the details are fresh
The entry that makes next year's reminder trustworthy is written on the day of the appointment, ideally at the evening feed when the notebook is already open. Record the date of the visit, the weight the practice measured, which vaccines were given, and any instruction to return sooner or recheck something specific. Then turn to the front pages and advance that cat's due month by a year. Doing both entries in the same sitting matters: updating only the log leaves the front page stale, and a stale front page is worse than none, because you will trust it.
Use feeding-time observations to enrich the checkup
A notebook beside the food earns a second keep between visits. Because you record appetite, portion changes, and gradual fussiness where they happen, the notebook accumulates exactly the feeding history vets ask about at annual checkups and owners usually cannot reconstruct. Before the appointment, skim the year's pages and copy the handful of relevant lines, a spring appetite dip, a switch of food, steady weight creep, onto the front block for that cat. You walk into the checkup with a year's grounded observations instead of impressions, and the visit produces better decisions for that cat.
Protecting the notebook against its own risks
A paper notebook by the food has two weaknesses: it can be lost or damaged, and its information is only available at home. A spilled water bowl or a notebook that walks off with a helper ends the system, and none of its pages can be shown to a vet across town. Photograph the front pages monthly as a crude backup, and keep the authoritative copy of each cat's dates and documents somewhere sturdier. For that sturdier copy, KinsLe Pet Passport gathers each cat's records into one portable packet, so the dates you track in the notebook are also available at the surgery, at a boarding handover, or in an emergency.