The Shetland Sheepdog is an outstanding companion dog and is intensely loyal. It is lively, intelligent, trainable, and willing to please and obey. Shelties are loving, loyal, and affectionate with their family, but are naturally aloof with strangers and might not appreciate being petted by someone they do not know; for this reason Shelties must be socialized extensively. Some can be quite reserved and some have varying degrees of shyness. Although they are excellent family pets, Shelties do especially well with children if they are raised with them from an early age; however, their small size makes it easy for a child to accidentally injure them, so supervision is necessary.