Sorry about your babies. You don't say how many eggs there were, but we just hatched our first brood last December. We were told by someone else who has chickens to expect to lose at least half of them due to weather and other factors. We did lose exactly half; there were fourteen, seven survived; they died over the first week to ten days, some the first day. We had a heat light on the mother and babesall the time for the first ten days or so, then turned it off at night after that, when they got under her. They were outside in the barn in an insulated elevated pen whose walls were wood on three sides. We were told by a local breeder here that we didn't need a heat light at all as long as mom was with them, but we just couldn't leave them out there all the time without a little heat during the day, at least. Sometimes you have to try to stay cool and just hope mom figures out what to do. I know it's hard. . but our seven remaining babies seem happy, healthy, and thriving; going on four months now. You'll get some healthy babies too, sooner or later.