A diary that survives because it is small
A health diary for one horse collapses the moment it asks too much, so fix a short weekly check - same day, same order, five minutes - and let everything else hang off it. Once a week run a weight tape around him and write the number down, then feel over his ribs, crest and hips for body condition rather than trusting your eye through a changing coat. Run your hands down each leg for heat, filling or new lumps, pick out the feet, and note appetite, water intake, droppings and coat in a line each. A single line honestly written every week beats a detailed page written twice and abandoned.
Spring and summer entries
Spring is when the diary earns its keep on grass: record turnout hours and how the grazing is growing, because steady weight gain and strong pulses in the feet are the early whispers of trouble in the hooves that you want in writing, not in hindsight. Note any change in his willingness to move or turn. Summer entries shift to heat and flies - how much he sweats at his usual work, whether he is drinking freely, sunburn on pink skin, fly worry and any rubbing. Logging workload alongside the weather explains a tired week far better than memory does.
Autumn and winter entries
Autumn brings the coat change, mud and the season's worm count, so the diary notes when rugs go on, how his skin copes under them and what condition he carries into the cold months. Winter is the deceptive season: a thick coat and a rug can hide a quietly shrinking horse, so take the rug off and use your hands at every weekly check, and record how much forage he is actually getting through, not how much you intended. Note frozen water, extra stable time and stiffness after standing in, too - the entries that explain a horse who is not himself by midwinter.
The dated anchors
Between the weekly lines sit the fixed appointments that give the diary its skeleton: farrier visits, dental checks, vet visits and vaccinations, worm counts and their results, and every feed change with its date. Writing these down as they happen means the diary can answer when he was last shod, or when this feed started, instantly - the two questions behind half the detective work in horse care. It also means a new yard, vet or sharer inherits the facts rather than a summary retold from memory.
Reading it back as a story
The diary's real value appears when you read across it rather than down it: this spring against last spring, this winter's weight line against the forage he was actually eating. Slow drift - a little condition lost each month, a workload quietly shrinking - is invisible week to week and obvious on the page. Take the diary to vet visits and let it speak for the horse, because a dated pattern carries more weight than a worried impression. Family Sharing through KinsLe means a chosen relative can be given access to his profile.