The shoe is level and the feet show no interference marks. T he natural wear and tear on the shoe is the culprit in this case. As the shoe material was worn away, the heads of the nails were also worn away, reducing the nails effectiveness. The natural movement of the hoof during locomotion caused the nail holes in the shoe to become worn. A shoe with worn nail holes will not hold securely.
Shoes can only be reset a limited number of times, then the horse requires new shoes.
U sing a larger headed nail with a slim shank, I reset the shoe. As I'm clinching the nails, I warn the rider that this is a stop-gap measure and that the horse needs the attention of it's regular farrier. A s the horse and rider trot back into the fray, the show manager shows up with two cups of hot coffee. A shoe will only remain secure for a limited time. The natural movements of the hoof, and normal growth will cause the shoe to come loose.