Ask most owners when their dog was last wormed and the answer involves opening cupboards. The current packet is in the bathroom, the previous one is somewhere in the utility room, and an older box is doing duty as a drawer divider in the kitchen. Packaging is the worst possible record system: it is scattered, it fades, and it gets thrown away by anyone tidying up. The dates themselves are simple — they just need one home that is not made of cardboard.
One list that outlives the packaging
Create a single worming log and treat it as the only authority: one line per treatment, recording what type of product was given, the day it was given, when the next treatment is due based on the guidance on that product's packaging, and where the rest of the supply is stored. That last detail sounds trivial until you are searching for a packet you know exists somewhere in the house. Keep the log with his other health records rather than with the supplies, because supplies move and records should not. If more than one person gives treatments, the giver writes the line; a log updated by the person who actually did it stays accurate in a way a log updated from memory never does. If a treatment is given at the clinic during another visit, add that line the same evening and mark it as clinic-given, so the home supply is not silently assumed to have been used. That distinction also stops you buying a replacement packet you do not yet need.
Rebuilding the history you have already lost
For past treatments, work with what can be verified instead of guessing a tidy history. Vet invoices usually show worming products dispensed or administered at the clinic, and your clinic can often confirm dates from its own records if you ask. Packets still in the house give you product names and sometimes a scribbled date; texts or messages to family members asking whether anyone remembers worming him are worth a quick search too. Enter what you can confirm as fact, and mark anything probable but unproven clearly as unconfirmed, so a future reader — including you — knows which lines can be relied on. Where a gap remains, raise it at his next vet visit and agree a sensible point to restart the schedule from, rather than doubling up a treatment to be safe.
Consolidating the cupboards and keeping the next entry effortless
Gather every worming product in the house into one labelled container in one place, and let the log's storage note point there. One location ends the three-cupboard problem permanently and makes an empty container its own reminder to restock. Build the log entry into the treatment moment itself: packet photographed, treatment given, line written, packet returned to the container — the same small sequence each time, taking under a minute. Set the next-due note somewhere you will see it ahead of time, alongside his other health reminders. In KinsLe, keeping the worming list inside his Pet Passport places those dates next to his vaccination record and other health history, so one look answers the question the cupboards never could.