Hi Ava,
Thank you for your question.
I wasn't sure myself, so I did a little research. Here are a few websites I found useful:
Horses can be divided into 4 main groups--light horses, heavy horses, ponies and feral horses. See this website to learn some examples of each group.
http://www.webertrainingstables.com/breed-numbers
A list of 600 breeds from around the world:
http://www.theequinest.com/breeds/
This site has a description of some of the breeds, with links to learn more.
http://www.horsechannel.com/horse-breeds/all_landing.aspx
Did you find this information helpful?
Please let us know if you need any further information,
Mrs. Clow