Start with the animal inventory
The first page should account for every animal on the farm: name, species and breed, age, where each one is kept, and a photograph. In an evacuation or a fire, that list is how you prove every animal is out, because nobody counts accurately from memory while smoke is coming out of a roof. Include animals you keep for other people, with their owners' contact details beside them. Note where each group can be moved to on the farm itself, a holding paddock or a field away from the buildings, so the first stage of any evacuation has a destination that everyone already knows.
The people page
Emergencies run on phone calls, so write the numbers down rather than trusting a phone that may be flat, lost or in the building you cannot enter. List your vet and a backup practice, your farrier, your feed supplier, the family members and staff who can get to the farm, neighbours with trailers or machinery, and the utility companies. Say who is in charge if you are not there, and who that person calls first. A named order of decision-making saves the argument and the delay when minutes matter.
Care instructions a stranger could follow
Write the feeding and daily care pages for the reader you hope never needs them: a neighbour, a firefighter's colleague, a friend who has never fed a horse. For each animal or group, say what it eats and how much in scoops, buckets or armfuls rather than weights nobody can measure in a hurry, where the feed is stored, what water checks are needed, and anything that must never happen, such as two animals that fight being turned out together, or a gate that has to stay shut because of what is on the other side. Note any animal on ongoing treatment, with what is given, when, and how much, exactly as the vet directed, so care continues properly if you are in hospital rather than just away.
Evacuation routes, destinations and site details
Record the plan while you are calm: which farms or yards have agreed to take your animals, the routes to them, which animals load first and where halters, ropes and trailer keys are kept. Add a simple map of your own site showing where the water, power and gas shut off, where the fuel and the fire extinguishers are, and which gates open onto the road. Copies of ownership papers, registration documents and insurance details belong at the back of the folder, because proving an animal is yours and that you are insured is part of the days after an emergency, not just the night itself.
Keep it current and keep a copy elsewhere
A folder describing animals you sold two years ago is worse than useless, because it sends people looking for animals that are not there. Review it whenever an animal arrives or leaves, and whenever a contact changes. Keep one copy in the house and one at the yard, and mirror the heart of it digitally: keep each animal's identity, health and ownership essentials in its KinsLe Pet Passport, and if both paper copies are out of reach, the information a vet or a rescue helper needs is still on your phone.