Woven fences are pretty dependable shoe pullers for horses.
I've had to doctor several horses that cut themselves on barbwire too. Sometimes without success.
Back in the late 1970's, several of us got some of the mustangs that were being adopted out. Mine was a mare that was the best looking of the lot, and the only one that was never rode. She got out one day and went in a barbed wire fence and it cut her legs up something bad. She was meaner than Hell and would try and kick the chit out of you, so I was very cautious about handing her. I got to the barn and in a stall, tied a rag to the end of a stick, put grease on the rag and treated her cuts. Did that a few times, and she healed up completely in no time. Grease contains sulfur, and sulfur is an ingredient in drugs, so it works good on cuts.