I need to order Cosequin Joint Supplements for my two mares from Smartpak Equine. On their website it gives you an option of how much or how little cosequin you want put into each package. A trainer who is taking care of my mares for the time being recomeended it. And I asked her how much I should order for each pre-made container? And she told me to call smart pak and ask them. Is that what I should do? How do you know how much should be put into each container? I would think it couldn't be the same amount for every horse.