What are shetland sheepdogs?

"The Shetland Sheepdog, often known as the Sheltie and sometimes as the Shetland Collie, is a breed of dog in the pastoral dog group, resembling a miniature Rough Collie.

Shelties are intelligent, family-orientated dogs that can be as happy in an apartment in a city as in a house in the country. They have a thick double coat that can come in many different colors and patterns. They are vocal dogs, with few health problems; among those they are prone to are hip dysplasia and thyroid problems. They are very good house and family dogs. They are very protective and good with children if properly socialized with them as a puppy.

Despite its name the Shetland Sheepdog is only remotely connected with the original herding dog of the Shetland Isles, instead deriving mainly from a mixture of the Rough Collie with several toy breeds."- Wikipedia.com