Hello everyone! This is my first time owning chickens and this will be our first winter together. I was wondering what all i need to do to prepare my girls? I have 3 mixed hens, 1 Delaware, and 2 silkies chicks (aren't yet in the coop) I read that silkies in particular don't do well with cold. I live in Florida so it doesn't get near as cold here as it does in other places, but we do have nights that can get as low as 28 degrees. Any tips would be great! I was wondering of should put a heat lamp in the coop? And how cold does it need to be before worrying and doing so?