Dr. Tarek Isham, DVM, Clean the "sole plane" of a horse's hoof to guide a safe and effective trim.

Dr. Tarek Isham, DVM, provides a detailed walkthrough on identifying the "sole plane" of a horse's hoof to guide a safe and effective trim. 1. Initial Cleaning and Exploration Cleaning: Start by cleaning the collateral grooves and the area around the white line. Testing with a Hoof Pick: Explore the sole with a hoof pick to see what material naturally wants to flake away. If it comes off easily with the pick, it should be removed. Using Senses: Dr. Isham emphasizes using sight, feel, sound, and even smell to understand the condition of the hoof. 2. Identifying Dead vs. Live Tissue Exfoliating Sole: This is the dead, flaky material on the surface. A sign of anaerobic spaces (where bacteria breed) is often a black color peeking through this layer. Live Sole: Once you clear the flaky material, you reach the "live sole." Unlike the dead tissue, the live sole is "indentable"—it has a slight give when pressed with a hoof pick or the dull side of a knife. The Goal: The aim is to open up anaerobic spaces to the air to stop bacterial growth while remaining as conservative as possible. 3. Key Landmarks: The Toe Callus and Apex Toe Callus: For a barefoot trim, Dr. Isham recommends trimming down to the surface of the toe callus rather than all the way to the live sole. The Plane: You can imagine the sole plane by looking at where the collateral grooves meet the true apex of the frog. This depth is a reliable indicator of where the sensitive tissue (sole corium) lies. 4. Safety and Depth The Layers: The hoof consists of the exfoliating dead tissue, the live sole, and finally the sensitive, bleeding tissue (corium). Conservative Approach: By identifying these layers through exploration and landmarking, you can ensure the trim is deep enough to be healthy but conservative enough to avoid hitting sensitive tissue. This video is an excellent resource for students and practitioners to learn the "story" the hoof is telling before they begin the actual trimming process.