Upon arrival, Dr. Beckman of Mt. Baker Veterinarians found the filly, weighing around 75 pounds, nursing but the colt, weighing only about 50 pounds, struggling on the ground. The colt needed milk as soon as possible, both for nutrition and the colostrum required in the first 24 hours of life to develop normal antibodies. A new born horse has no natural immunization and requires one to two pints of colostrum from its mother to develop normal antibodies. The colostrum has to be received its first 24 hours of life to be absorbed and it is critical that the foal receive 85% of that within the first 8 hours of life. Typically a mare only produces enough colostrum for one offspring so the horse owner of twins may need to purchase additional, expensive colostrum.
You can find more photos of Aska and the twins at: