Memory edits an illness within days. The night of broken sleep feels longer in hindsight, the day he first ate properly blurs into the day after, and by the next vet visit the sequence that would actually help the clinician has softened into a summary. A short log written during and just after the illness preserves the timeline while it is true, and it becomes one of the most useful pages in his file.
The onset, recorded before it fades
Start with when you first noticed something was wrong and what that first sign actually was — off his food at breakfast, quieter on the evening walk, a single vomit, loose stools on the morning toilet break. Note what had changed in the days just before: new food, a scavenged item on a walk, visitors, travel, heat, fireworks or another animal in the house being unwell. Record appetite, water intake, urination and stools in plain daily terms, and energy and sleep as you observed them. If your vet asked you to monitor anything specific at home, log exactly that, with times, rather than adding measurements nobody requested. Honest observation, dated, beats confident reconstruction every time.
Vet contact and advice, kept verbatim where it matters
Write down each contact with the practice: when you called, what you described, what you were advised to do at home, and the point at which you were told to come in or call again. If he was seen, file the visit summary with the log and note any tests carried out and results as reported to you, in the vet's own terms where you have them in writing. Note the follow-up arrangement — a recheck date, a phone update, or watch-and-wait with named warning signs — and whether that follow-up actually happened. Avoid translating the vet's words into your own diagnosis in the log; a later reader needs to know what was found and advised, not what it felt like from the sofa.
Recovery, day by day until normal returns
Log the recovery with the same care as the crisis: first normal meal, first firm stool, first walk taken at his usual enthusiasm, return of play, drinking and sleep settling back. Note what you fed during recovery and how you transitioned back to his normal diet, because if the same signs recur, that feeding response is a clue. Mark the date you judged him back to normal and anything that did not fully return — a slightly reduced stamina, a new caution around a food, a lingering sensitivity — rather than declaring the episode closed because the worst passed. If weight was lost, note estimates or the vet's scale reading from the visit so regain can be tracked.
What this log does next time
Close the entry with a short line on what you will watch for and do earlier next time: the early sign you now recognise, the item you will keep out of reach, the point at which you will call the vet sooner. File the log with his health records, not in a phone note that will scroll away, and mention it at his next routine visit even if he seems fully well. Patterns across two or three short, honest logs are often what let a vet connect episodes an owner experienced as unrelated bad luck.
Written that way, an illness leaves knowledge behind instead of just relief that it ended. Filed in a KinsLe Pet Passport, the log sits with his other records in one portable packet, so any vet meeting him next reads the episode in full.