I noticed in the grocery store circular that baby back ribs were on sale. I thought it would be great to stock up and throw them in the freezer for future use. But when I looked at the small print in the ad, it said "previously frozen". Generally speaking, the meat in the case in the store when you go to buy it is thawed and ready to use. Does that mean you can't re-freeze it? If I do, will the quality of the meat deteriorate? To make it worse, we have no idea how many times the meat has been frozen, thawed, and re-frozen. Has anyone noticed this before? What has been your experience with meat that has been "previously frozen"? Thanks.