I managed a farm for 6 years that had the Centaur polymer-coated high tensile wire. I helped install most of it, and it was pretty easy.
It is a fairly safe fence; as with anything, horses WILL find a way to injure themselves. But only ONCE did we have a horse get loose, and she was so determined to leave her field and follow her buddy she would have gone through a brick wall (and seriously injured herself). With the HTP fencing, she had a scrape on her hindleg and that was it.
Had several instances of horses bouncing off it with nary a mark. Had several horses paw it (feeding time) and get a small abrasion on the pastern, but nothing major. The ones that stuck a whole leg through might rip out some staples 2 or 3 posts down, but neither horse nor fence were overly damaged.
The worst instance happened when the middle strands were just a little bit loose. I don’t know what he was doing, but a quiet gelding in individual turnout managed to get a hindleg through the 3rd/4th strands, back through the lower 2nd/3rd strand, with the 3rd strand caught under his shoe. :eek: I don’t know how long he was hung up-- possibly 30 minutes or an hour. He was incredibly patient when I found him; had possibly struggled a little, but not too much. I cut those three strands of wire to get him free, but I had to remove the shoe to get the wire off (yikes!). He was wearing boots, and his hind shins were spared; his hock skin was shredded, and the whole leg was very swollen for a few days. No lasting ill-effects, though, and you can be SURE that fence was kept super tight after that!
We had 5 strands of normal thick poly wire, with a thinner coated electrified polystrand on top. Most horses respected it just fine.