I love that you focused on the nostrils!...great image! Keep at it with the motion images with horses, they can be so incredibly beautiful...you can find them always in the early morning warming up for horse shows,,,I prefer English(huntseat) but if you go to any Western shows you can try for sliding stops, patterns and even obstacle courses...great fun and usually a free gig!
There will also usually be people warming up in an outdoor ring the evening before any show series so the light then is amazing as well! Good luck, I am looking forward to seeing more!