I bought a large bag of Blue Buffalo Small Breed Dry Dog Food for my dog. Bought it on sale so had it for a couple of months before opening it. No rips or tears in bag and it was kept under ideal conditions. Expiry date is 2022. When I finally opened it and transferred some of the food to a smaller container, I found a huge hunk of mold. Only the one clump but it was disturbing. Contacted the retail store and the manufacturer but no one wanted to take responsibility or do anything about it. Has anyone ever encountered this problem before. I definitely am changing brands.