New chicks hatched on Thursday...we've had subzero temperatures. I have GLRW hen sitting with 3 silkie chicks. She's in a wired dog crate with straw and pine shavings with a metal wire dog kennel around that...we have a heat lamp over the kennel area to help with the heated water dish..but still very cold in there. Supposed to warm up to be in the 30's in next day or two. I haven't noticed mama hen bring them out to eat or drink yet...should I be worried?