I've got an almost 13 lb frozen bird. I pulled it from the freezer Monday night and parked it in the refrigerator. This morning I pulled it and put it in a sink of cold water. Since the top part isn't submerged, I've been flipping it every 30 minutes and changing the water. How do I tell if it's thawed? Once it's thawed, what's the recommended time/temp to roast at?