Читать книгу Bovine Reproduction - Группа авторов - Страница 269

Hoof trimming services are a great practice builder. Much of the literature available discusses hoof trimming in dairy cows, but the same basic principles can be applied to beef cattle as well. The Dutch five‐step hoof trimming method is a good protocol to follow; however, any method of hoof trimming will certainly do as long as the animal has an even weight‐bearing surface with proper hoof angles to ensure balance and symmetry of the hooves.

Most beef cattle presented for hoof trimming have grossly overgrown hooves, often due to issues with subclinical acidosis and multiple events of subclinical laminitis during their development. After restraint of the individual, either in a hoof‐trimming chute or on a tilt table, the animal's hooves should be cleared of any excess organic debris. Evaluate the length and angulation of the hoof and identify the amount of wall and sole to be removed (Figure 16.31).

Figure 16.31 Trimming the overgrown claw resulting from chronic subclinical laminitis.

This process is almost automatic for the seasoned trimmer; less experienced practitioners should take their time and assess all four hooves before beginning the process. Starting with the front hooves, use hoof nippers on the lateral claw to shorten the toe to 3.25–3.5 inches (Figure 16.32).

Figure 16.32 First step in trimming of the hoof is shortening the claw to an acceptable length.

Proceed to trim the sole, leaving approximately 0.25 inches of sole; when the white line is apparent, you have removed enough sole. As sole is removed, make sure that the remaining sole surface is level and even, front to back. Next, the medial claw is shortened, and the solar surface is trimmed to match the lateral claw. When complete, both toes should be evaluated with a flat surface (a small board works well) to ensure that both hooves are level [21] (Figure 16.33).

Figure 16.33 Completed trimming of a grossly overgrown hoof.

Lastly, the sole should be modeled, scooping the axial portion of the claw to create a dish‐like effect on the sole, which reduces the opportunity for mud or manure to build up between the toes and gives a more natural appearance to the hoof. After the claws have been properly shaped, address any solar defects and questionable wall areas.

Once the front hooves have been taken care of, the rear claws can be assessed and approached in reverse order, starting with the medial claw. Completion of the procedure should be followed by overall visualization of all four hooves, paying particular attention to the interdigital space. If any evidence of disease is observed in this region, it should be addressed before removing the animal from restraints. The animal should also be examined as it leaves the trimming area to ensure no lameness has developed.