Hey! My friend and I found what we think is a duck egg outside work, and I picked it up before I realized it was an egg. When I put it back it moved noticably, and after made some slight movements. Not knowing if it was abandoned or if there was a duck nearby we left if there overnight. The night was cool and rainy, around 50°C. Today we brought it inside and put a heater on it to warm it up, but it hasn't moved. How can I tell if it's still alive?