When chickens go on sale, I always like to buy at least a couple and throw the extras in the freezer. How long should it take to defrost one the "safe" way in the fridge? I'm talking about whole chickens about 4-5 lbs in size. I had one in the fridge for about 36 hours and it was still frozen completely solid, frost still visible inside the package. I don't keep my fridge abnormally cold or anything, but I always end up having to defrost under cold water because I don't have the patience to wait and see how many days it will actually take in the fridge.