Dodson & Horrell Mare & Youngstock Concentrate is especially formulated for warmblood, part-bred and native mares and youngstock. Especially formulated for warmblood, part-bred and native mares during gestation and lactation and for youngstock from a year old up until 3 years of age. A high oil, high fibre mix with elevated vitamins and minerals which can be fed at low levels while still meeting vitamin and mineral requirements. High oil and fibre. idela for use with good quality forage. Elevated vitamins and minerals.