Thanks for the response Jahra.

So far, I've gotten this from the large animal vets from whom I've been able to get responses -

The feeling is that cases where blood loss is a real threat (severe arterial bleeding) are pretty rare. It does happen, and it would be great if you happened to have CELOX on hand when it did. But the chances of being able to administer it within the very few minutes of opportunity are... well... slim and none. It's not like a combat situation where there's almost always a medic nearby and those kinds of wounds are expected and anticipated.

The product does have a good shelf life, but I'm not sure that many vets are going to carry it with them religiously just in case of something so rare.

At this point I'm just going to give some to a few large animal vets, wait a while, and see if they've had any occasion to use it. I can't help thinking "if it only saves one good horse, isn't it worth it?" If it happened to be MY good horse, it certainly would be!