Has anyone out there ever heard of a micro stock site that specializes in western images? horses? cowboys?

.... I think that is too specific for micros.

I would think so too. Micros make their money through volume sales. The "pile 'em high, sell 'em cheap" model.

Thanks for your input.  I have quite a few on IS and doing better every month, but know I would do better with a specific market.  Will you share the macro sites with me?
Thanks in advance.

They're not sites, their actual agencies. Check out the "Photographer's Market" book (every barnes & nobles / border's carries that book).

You could check out www.westernhorseman.com it's a magazine that will buy what you're selling. Click on "Writer's Guide".