My favourite hen got eaten by a fox. I was expecting one of my 3 hens to get broody as the weather got warmer, so my hens would get to have some of their own offspring. (I had a hen go broody last year and gave her surrogate eggs as we had no cockerels then). Anyhow, as this was my "favourite" I really wanted some chicks out of her. But now she is in the belly of a fox. But, I do have at least one of her eggs (perhaps two). I have put them in a wooly hat on top of a warm TV receiver and am hoping the eggs stay alive while I figure this out. Is there any kind of DIY incubator I could set up quickly? Real egg incubators are expensive and I can only get them mail order so will probably take a week to arrive. I could perhaps source a heated seed propagator locally. How warm do eggs have to be?