year-old Garrett Mullen watches three-day-old pinto stallion named Einstein in Barnstead, N.H., Sunday. The diminutive horse born in New Hampshire could lay claim to the world record for lightweight foal. The pinto stallion named Einstein weighed just 6 pounds and measured 14 inches in height when he was born Friday in Barnstead, N.H. Those proportions fit a human baby just about right but are downright tiny for horse, even a miniature breed like Einstein.