Bests & Worsts Reviews from Amazon

I purchased a number of cans of this exact version of this product from two different grocery stores. The contents of each can was excellent. Since this this a quick and easy source of protein I purchased a case from Amazon. I had the first can this morning and it was terrible. It tasted like the smell of old fish. It has also given me an acidic taste that I cant get rid of and an acidic feeling in my stomach. Very strange. The use by date on can was 01 06 21. I assume the 21 is the year. After tasting that first can I will contact the company to be sure about how to read their use by date. I am not at all anxious to test the remaining 11 cans in the case. But I will since I added the product to my subscribe and save. If even one of the 11 tastes like the first can I will definately cancel my subscribe and save.