A Merino flock is counted in hundreds or thousands, not in pets with names, and its health records must be built for that scale or they will simply stop being kept. Organise a Merino sheep's vaccination and health records as a flock log organised by management group — the mob — with ear-tag numbers used whenever an individual animal is drafted out, treated, or culled, and with full individual pages kept only for stud rams and ewes. Alongside the health log, keep the shearing record in the same book or folder, because in a wool breed the two calendars constantly explain each other.
The Mob Is the Unit of Record
Merinos are handled, vaccinated, and moved as mobs — a mob of weaners, a mob of dry ewes, the wethers on a particular run — so the flock log should be written the same way. Each entry records the date, the mob by its paddock or class name, the size of the mob, what the session covered, and what was used up in doing it. Entries written mob by mob match the way the work actually happens in the yards, which is why they get written at all: nobody can maintain a thousand individual files, but anyone can log a day's work on one page. Keep mob identities stable across seasons where you can, so this year's entries can be compared with last year's without a translation table.
Tag Numbers Capture the Exceptions
Within the mob system, the individual Merino enters the records by ear-tag number at the moments she stops being average: drafted out lame at a handling, treated and held in a hospital pen, struck by flies, found dead, or culled and for what reason. Keep a running exceptions page per season — date, tag, mob, what happened, outcome — and let it be blunt. In a large flock these exception records are where the management value concentrates: they reveal which bloodlines throw the problems, which paddocks generate the losses, and whether a health issue is a pattern or an accident. A stud Merino, by contrast, gets a full individual page from birth — parentage, vaccinations, fleece measurements, progeny — because his records are part of his price.
Shearing Records Belong Beside Health Records
For a Merino, the shearing calendar is a health calendar in disguise: crutching and shearing dates determine when sheep are handled, when they are vulnerable to weather and flies, and when they are inspected skin-close. File shearing and crutching dates in the same chronological run as vaccination and handling entries, or in a parallel column of the same log, so a question about a mob in a given month gets one answer from one place. Fleece weights and quality results by class belong in the same section for stud and flock alike; a drop in a mob's fleece figures is health information, and it should sit where the health reader will see it.
Review at the Turn of the Season
A Merino record system earns its keep at planning time, so review it twice a year: before shearing and before lambing or joining. Close out the season's exceptions page with a summary line — losses, main causes, mobs affected — and archive it; summaries are what get read in five years, raw lists are not. Keep the working log in the woolshed or the ute, not the office, because entries written in the yards are the ones that exist. Scale is no excuse for a flock remembered by anecdote, and KinsLe's Pet Passport keeps an individual Merino's records together in one portable packet when a stud animal's documented history has to travel with it to a sale or a new stud.