Series of 4 horses or not

I had 4 of 12x12 canvas in my car and a brush and a few tubes of paint one day as I was traveling to Malibu.  It so happened I had some time to paint and I started putting paint on those canvases set next to one another.  One looked to me like a body of a horse that needed a head so I painted that in and the rest the painting process took care of itself :) 

The two top ones without an obvious indication of horse's heads didn't quite need any but complement the two at the bottom so why mess with it?