When working with lighting take into consideration your speed of film. I like to use 100 and 200 for portrait shots. Action shots are best with 400 and even 1000 speed film. She recommends using 400 speed film and a fast shutter speed for those action shots. Also, a using a flash will help stop the action.
Patience is crucial when it comes to photographing any animal.
Have a handler. It is frustrating trying to photograph a horse on your own. Timing is everything. A handler can work at setting up the horse and with a little encouragement from a tree branch to a rattling can, maybe those ears will prick forward. Selling a Performer More about action.