Pint-Sized Pinto May Be World's Smallest Horse

April 25: A 3-day-old pinto stallion named Einstein feeds with his mother at the Tiz A Miniature Horse Farm in Barnstead, N.H. The tiny stallion weighed just 6 pounds and was 14 inches in height at birth -- proportions fit for a human baby but downright tiny for a horse, even for a miniature breed like Einstein. (AP)

April 25: Dr. Rachel Wagner holds a ruler next to her 3-day-old pinto stallion named Einstein in Barnstead, N.H. (AP)

April 25: Four-year-old Garrett Mullen watches the 3-day-old pinto stallion Einstein in Barnstead, N.H. (AP)

April 25: A 3-day-old pinto stallion named Einstein stands near a much larger St. Bernard at the Tiz A Miniature Horse Farm in Barnstead, N.H. (AP)

April 25: Dr. Rachel Wagner watches as her miniature stallion Einstein meets a much larger horse on the Tiz A Miniature Horse Farm in Barnstead, N.H. (AP)