Join Date: Jul 2011
Location: Bethel, Ohio USA
• Horses: 0
There are at least three farrier related possibilities; possibly more.
If nailing intrudes on the sensitive laminae it's called a "hot nail". There is often bleeding associated with a hot nail and the horse will typically present discomfort immediately. In such cases the offending nail is removed and the wound treated with an antimicrobial. In rare cases an infection may occur but more often than not the horse walks off fine and remains so.
If nailing impinges upon sensitive tissues, but doe not intrude, it's called a "close nail". The nail is close enough to sensitive tissue that it creates pressure. This type of insult will typically present some level of lameness within 24 to 48 hours. Again, the farrier simply removes the offending nail. Infection risk is minimal and the animal typically walks off fine once the nail is removed.
Sole pressure can be a third farrier related issue. There should be slight "relief" between the shoe and the sole of the horses foot. While some pre-manufactured shoes have built-in sole relief, I find it is often not enough. Additional sole relief can be forged or ground into the foot side of the shoe before installation. If sole pressure is in excess, lameness can occur shortly after installing the shoes. To correct the problem, the shoe must be removed and additional sole relief provided. The farrier should check for any bruising of the sole if a lack of relief was determined to be causal in the lameness.