Jeanne Anderson Watercolors

I am going to be doing a painting of my cousin Joe's horse "Maria". She's a beautiful animal. I am a little intimidated since I have never done horses before, but nothing ventured, nothing gained. I've got a test painting all drawn out and ready to paint. It is not the size or composition I want for the actual commission work.

As a result of prompting by my dear friend Julie, I added this background. It may or may not be what she thought I should add, but it's there none the less. I like the wishy-washyness of it, but not sure if the colors are right or if I should have been more precise and added detail to the background. Thoughts?