They are one of the oldest and calmest breeds. Adult Himalayans weigh 2 1/2 to 4 1/2 pounds (1 to 2 kg) with an ideal weight of 3 1/2 pounds. They are the only cylindrical rabbit breed. The history of the breed is partially a mystery, as there are no definite records that clearly state where the breed may have originated. Some speculate that their origin may be in the Far East as opposed to the Himalayas, as their name suggests.