Hi everyone. So I'm pretty new to Stardew valley and still have a long way to go, but I'm having a few issues with my animals. I'm on year 3 and my chickens are 4 months old. I feed them everyday let them out every morning and they have plenty of grass to play with and eat I also have heaters installed in the coop and barn for the winter yet the hearts don't seem to be showing up. Can someone tell me why that is?