I didn't think that was for horses, but I just checked and there is a
product for horses. Looks like others have had a problem too.
I have heard about how bad a lot of horses backs are from people
who worked in processing plants. There are various reasons for this,
none of them good. I wonder how long it will be before you can
ride your horses with a good conscience that their backs aren't
still sore? Have you contaced the maker of the product? I think I would.
This seems to be some bad stuff. Poor horses.
There was a blog and one lady said this:
BAD BAD JUJU!!!
I got the Ultra Boss last year that's marketed for horses. Tried to do the "pour on" on Lance (the big draft) and two mintues after we put it on he went all the way down and started moaning (course he's a big baby about ANY pain, but this was bad). Got the hose and soap and scrubbed it off all day long. The ONLY releif he got was when the water was on and keeping him cool. I KNOW it would have caused a burn if we hadn't of got it off.
I'd previously diluted it with water and sprayed it on some of the other horses cause I wanted to "test drive" it first and they did just fine with it heavily diluted. And it seemed to last about 5 days. Lance did fine with it diluted after that, but I WOULD NOT pour it on any more horses ever.
We use pour on's with the cattle all the time and they are just fine. I just cannot think that anything formulated cross species with equine/bovine is really a good idea when it contains both Permethrin and Piperonyl Butoxide.