What would you do (20 characters)?

Because of the way they burrow into the skin, Mites are difficult to completely get rid of, and when a horse has had them they are likely to always have onsets of mites. So even if this other horse did not have them, chances are your horse will have flair ups anyway at some point or another, and mites are likely to always be around in the herd in some form.

All you can do is treat your own horse. Soak his legs in hibiscrub a few times to help get rid of them and suss his itching out.

Also make sure you keep your stable clean so mites are less easily harbored, and limit the ammount of time this horse spends around the infected horse as much as you can and you should be able to manage it.

I would tell the BO that you have to move your horse. Thank goodness this is not a real problem here in the states. But they do spread from horse to horse so I would get mine to another barn or another farm all together.

Call your vet and explain the situation. Ask what steps you can take on your own to stop this from affecting your horse. I know no way out - sorry that one ignorant, arrogant person can ruin a stable.

Take it into your own hands and talk to the other guy's owner yourself. Or request to move your horse into another stable.

you can get an injection to get rid of and prevent mites from your vet!