Taken in natural light only. Had to adjust curves slightly so her blaze wouldn't be washed out. Added a touch of sharpness to bring out the eyelashes more. Effie (16 yrs. old) is my daughter's horse. They just have a love for one another. She's a Morgan by the way with all the energy of the Energizer Bunny. She goes both in the show ring and on trails.
Great composition! Really great shot. The exposure is fantastic, except in one small area - looks a teeny bit blown out on the white on the mid-right - it's the one place you can't see the detail of the hair. You might try burning that in in PS will bring that detail back (if it's there on the slide, of course.)