Instructions
Check your horse's registration papers or certificate of pedigree. No horse competition or show society will allow a horse to be registered, especially in a breeding program, without proof of pedigree. If your horse is registered already, you will have proved its lineage. If it is not registered with a society, your purchase and ownership papers should at least tell you the names of your horse's parents.
Speak to your breeder. If you do not know your horse's parentage, your breeder, or the organization who sold you the horse, will. They should even have records of other horses in your animal's line going back several generations, or at least point you to other breeders or organizations to help you in your search.
Use a pedigree generator to enter your horse's information. You may want to advertise your horse's ancestry on your website: free generators on sites like pedigreequery.com allow you to create your own HTML family tree for your horse. You can also use family tree software designed for tracing human lineage to create an ancestry document for your horse. Get your chart's HTML code and add it to your website. You can also tweak the color and cell size options to customize your chart to your preference.
Print your pedigree chart and keep it with your other ancestry records: it is essentially a summary of the other documents for quick reference.
How to Document Horse Ancestry
When it comes to buying and selling horses for racing or shows, the pedigree of your animal is extremely important. If you are selling a horse, potential buyers will want to know its lineage and ancestry as far back as possible, to ensure it comes from "good stock," as it were. Finding out a horse's ancestry is not extremely difficult; good breeders will keep good records. All you will need to do is collect this information and create a lineage flow chart, like a family tree, for your animal.