The cup is for all intents useless as just laid eggs are not producing any of their own heat, and even insulated well won't stay warm long due to their small volume, if you don't want the egg to freeze bring it into a warmer area or heat the area it's at...
I agree it can, but generally a vast majority of coop fires are due to unsafe and improper heating installs/techniques, if done properly the risk is minimal at best, honestly no more then the risk of heating your own house or using a heater for their water...
I have said it multiple times, heat...
Heating my coop and also using supplemental lighting keeps my egg production steady all winter and the sales of those eggs (less competitors in the winter equals easier and more sales for me) each month more then pays for the heating bill, so it's no money down my drain, it honestly helps turn a...