Shetland Sheepdogs, or otherwise affectionately referred to as Shelties or the Sheltie, are great little dogs. Their weight as adults generally stays withing the 20s range. These dogs actually look like miniature Collies, but they aren't related at all. This is an individual breed unto the Sheltie. This breed makes for a great family pet. They're incredible with children, but they do have the tendency to bark at times, so be sure to check with your neighbors before buying or adopting one of these dogs. As far as their personalities go, Shelties are super smart and they learn very fast. They also love to play, are gentle around children, obedient, and are people pleasers. If you're searching for a small dog to make part of your family, check out one of these.