I bought some chicken breasts and put them in the freezer 2 days before their useby date. I got them out today to make a pie and when they were defrosted they had a small that resembled sweaty socks. They didn't feel slimy or had changed colour just the small and it wasn't all over just in places. I cooked it anyway and it tasted like it has been reheated and not fresh but not a bad taste either. Should I bin it or keep it and will the 4 Tony bits I are make me I'll if they were off?