Hello, I bought some Merrick Grammy's Pot Pie from petfooddirect.com, I've opend about 5 cans so far of it. Each can has had some small black pieces in it. I've also noticed some small chunks were very hard (while smashing it up with a fork). I was just wondering if this is normal for Merricks cat food? The expiration date is July 7th, 2009. Thanks