Omega Alpha Biotic 8 helps promote a healthy digestive tract and gut flora. This digestive supplement for horses is an eight-strain probiotic with three digestive enzymes. A carrier system helps to protectfrom stomach acid, allowing it to reach the gut and hind gut where it can start to populate. Biotic 8 contains spirulina and kelp as additional micro-nutrients. 2.2 pounds. A Dover Saddlery brand product. Dover Saddlery only offers quality products that they would use on their own horses, so you can have complete confidence in your every purchase. The Dover tradition that began in 1975 continues today - using their understanding of horses and the sport to better serve the equestrian customer.