Cannon

The straight bone between knee (or hock) and fetlock, with the tendons behind it.

What is it?

The circumference of the cannon, measured just below the knee, is a classic gauge of bone strength relative to weight. The flexor tendons behind it are vulnerable; heat or swelling here is always a warning.

Where is it?: Foreleg

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Forearm Knee Fetlock Pastern Test your knowledge in the quiz All body parts

Sources: Merck Veterinary Manual · Wikipedia · The Open Sanctuary Project.