Shetland pony

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A small strong pony of a breed originating in the Shetland Islands, having a long thick mane and tail.

from The Century Dictionary.

• noun See shelty.

from the GNU version of the Collaborative International Dictionary of English.

• One of a small, hardy breed of horses, with long mane and tail, which originated in the Shetland Islands; a sheltie.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A small horse of a breed originally from the Shetland Islands

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun breed of very small pony with long shaggy mane and tail