That's a good question, and if it were me after you thaw the meat I would look to she what you have. Check the color of the meat, and see if it's slimy, or has a peculiar smell? If they have not been frozen for an extended period of time you may be okay. Try one before you serve the crowd. You won't get sick, but the quality may not be there.
You can really see this in frozen fish after more than six months of being frozen, but with other meats you are going to have to use your judement.