Practically most, but not ALL, chicken sold at retail level is Grade A. Chicken in this category will be firm, full breasted, meaty, no blemishes, no broken skin or broken bones. Grades B and C can have any or all of the defects listed above. As a rule, when supermarkets feature a loss leader item, such as .69¢ Leg Quarters, etc, they are Grade B or C and the grade label or may not even be labeled at all. If the word "blem" is mentioned, consider it B or C.
Big box stores will buy what they can get at a good price and some of that chicken will not be perfect and will have trimmings mixed in with them. Look what I got at Costco......
Pulled a pak of Goldkist Bnls Thighs (purchased at Costco) out of the freezer y'day so I could try the Millers Dry Brine on them for dinner.
Here is what I ended up with this morning
Three dinky thighs and a sh*tload of trimmings
Yeah, some of those little nuggets are hard to eat