What are the requirements for a trailer shoe?

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The idea behind a trailer shoe is to provide outward protection by extending the shoe to the outside of the hoof. It should project laterally from the centerline, with the length matching the stock width. This keeps the extension proportionate to the hoof, maintains balance, and gives a predictable, straight edge that reduces the risk of snagging on trailers, ramps, or other obstacles. Extending medially would push toward the other leg and increase interference, while a curved or overlong projection can create instability and snagging. Keeping a straight, lateral extension equal in length to the stock width gives the proper balance and clearance for safe trailer use.