I bet they are fine. People used to hang their game in a cool room for days, even weeks before eating it. Remember, you are going to be cooking these birds thoroughly, so even if there is a bit of bacteria on the skin (almost a given if you don't do the nasty bleach baths they do in industrial processing plants) the bacteria will be killed by the cooking. I agree that you should always check the smell and color of meat before you cook it, but when you buy stuff in the store, you have no idea whether it was always kept at optimal temperature from slaughter to your table. I'd proceed under the assumption that everything was fine if it were my chicken and my efforts and my family.