And of course, whenever practical, change the subject. This is a toughie. There is nothing harder to hide than blood. If it was brown or green it wouldn't be so bad. But red . . .
Physical technique is important.
Since all blood looks alike, a little more probably won't matter. Of course if there is major leakage, slipping and falling could be a problem with this technique. This horse had an abscess. Sure was lucky that I was here. This approach turns a bad situation into a tip.