Man 2.2 lbs is 128 dollars? yikes! How quickly do you go through this? And how do you store it? I can't imagine how enzymes could still survive if over like a month and not stored properly....I'm not a vet, know nothing about the product you mentioned above. I do know about prozymes a bit...I chose the vetraceuticals because it has not just the enzymes, but a wealth of other good stuff as well. It is 34.95 plus ship for a months supply approx for a shepherd size dog. They ship it once a month so that you receive it no longer then a month from the time it was made, and then you are shipped the next months supply the next month (a slightly different formula, it rotates so that while dogs receive the ingredients they should receive daily, ie enzymes, probiotics etc, they dont' receive the stuff they SHOULDNT receive daily allt he time.) It is refrigerated after opening. 

As I said, I don't have an EPI dog, I know others with it. I watched a shepherd literally go from 80 lbs to like 50 in a short period of time, he looked AWFUL. I wish I could get in touch with his owner now.