Acti-Flex Senior by Cox Labs is a nutritional supplement specifically formulated for the "old timer" to help them stay flexible, comfortable and maintain a healthy weight. It contains the same joint benefiting nutrients as Acti-Flex and includes probiotics to help older horses compensate for reduced digestive efficiency so the nutrients can properly be digested to benefit all vital systems. This is particularly beneficial for older horses that may have difficulty gaining or maintaining a healthy body weight. Acti-Flex Senior is manufactured in an alfalfa-based powder that proves to be highly palatable. The 16 lb tub will provide up to a 256 day supply for one horse. Please Note: Cox Veterinary Laboratory products cannot be shipped outside of the contiguous United States. No longer contains Type II Collagen