Glad his injury is doing better. That is great news.
I stand by it that you do not have accident prone horses. That title is reserved for horses who mange to injure and break themselves even though they are living in a safe horse environment. Horses that live in barbed wire, loose wire fences and such that injure themselves are just a statistic because it is inevitable. Your Uncles horses that are not injured yet are just lucky.
I am glad you are working on making the fencing safer. Keep it up.