hi, i am new to all of this... the forum thing, and the chicken thing. and i am trying to get some info on chickens. i don't have any yet. but i live in pennsylvania, and have always like the silkie chicken's. i have a 4 foot chain link fence around my yard. i am wondering if i just build a "moveable" coop for a few chickens 2-3 if they would do fine to be able to run around the yard "un-attended"? are the smart enough to hide if a hawk comes into to picture. i have lots of hiding places in my yard with low branched pine trees, peonie bed's, and lilac bush's. also i am wondering if they need to have some form of heat in the winter? i wanted to make the coop moveable so that in the winter i could move it into the front yard where i get sun most of the day. as for the silkies would they be ok, or would a different bantam breed be better, or even a heavier breed. i don't really want them for egg production, or meat. although a few eggs would be nice. thank you for your help.