Recommended amount is 20 grams twice per day, or 40 grams once per day, or at the advice of your veterinarian.
Spirulina is an anti-oxidant and anti-inflammatory. For best nutritional support, it is recommended to administer it with chondroitin sulfate.
Spirulina is a blue-green algae, and has the particular smell of algae in a pond. Some horses object to the smell to start. If you add a small amount to their bucket, then gradually increase the amount, the horses adapt to the smell of their food. Some people also sprinkle a small amount around the horse's stall, just so they get used to the smell. Once the horse is used to the smell, most horses will consume their bucket with gusto.
Approximately 20 grams per 1/8 US cup.
Disclaimer: This product is not intended to diagnose, treat, cure, nor prevent any disease. If your horse experiences any adverse effects from using this supplement, discontinue use and contact your veterinarian. For use in animals only.