Design Business Logo

I am looking for someone to do a simple logo design for my horse training business. I am not interested in anything fancy. I want something simple that can easily be used on several different types of mediums - website, business cards, shirts, ball caps, yard signs, etc. Uploaded is the current logo I use. I want something simple and similar, but unique. My preferred colors are green and earthy. For this reason, a gif format with transparent background is preferred.