The Coggins is a blood test for equine infectious anaemia, a viral disease with no cure that spreads between horses via biting flies, and the laboratory report — tied to a careful description or photographs of the horse tested — is the document officials ask for. Unlike a vaccination, it does not protect the horse; it proves that on the day the blood was drawn, this horse tested negative. How long that proof is honoured is a rule of the destination, not of the laboratory.
The General Window: Six to Twelve Months
Across most journeys you will meet two standards. The widely used one accepts a negative result drawn within the previous twelve months, and it covers a great deal of ordinary interstate travel. The stricter one, used by some states and by many show grounds, sales and livery yards, requires the blood to have been drawn within the previous six months. Neither standard is printed on the certificate itself as an expiry: the report states when the sample was taken, and the official reading it applies their own window. That is why the same piece of paper can be perfectly valid for one journey and refused for another shortly afterwards.
Why the Destination's Rule Is the One That Counts
A horse crossing into a stricter state, entering a showground or arriving at a new yard is being admitted under that place's conditions, and their window wins regardless of the rules back home. Some venues tighten their requirement for a particular event, and some yards keep a short window permanently because horses come and go constantly. The practical habit is simple: whenever a journey is planned, ask the organiser, the destination yard or the state you are entering what they require, and count backwards from the travel day to see whether your current result still falls inside their window. Carry the report where it can be produced with the horse, too: an official who cannot match the horse described on the paper to the animal standing in front of them can refuse it even when the window itself is satisfied.
Timing the Blood Draw for a Season of Travel
If the existing result will fall outside the window mid-season, it is usually simpler to have a fresh sample drawn before the first journey than to gamble on a mid-season vet visit fitting around competitions. Remember that the laboratory needs time to process the sample and issue the report, so a draw booked the day before departure is a gamble of a different kind. Horses that travel with a health certificate as well should have both documents planned together, since the certificate runs on a much shorter clock, and keeping the two windows aligned saves a second call-out. Owners running several travelling horses often have blood drawn from all of them on the same visit, so the whole yard shares one window and one expiry to keep track of.
KinsLe's Pet Passport keeps the current Coggins report in the horse's own records packet alongside his health certificates and identity papers, so when someone asks how long the result has left to run, the answer is one page away.