Hello! We are first time chicken owners. We bought 8 chicks that were born on 10/5 and we have had them for about 3.5 weeks. They have all been fine, one has always acted a bit odd... much less active than the others. Except for that, they have all been fine... we have been starting to let them outside for playtime 10-15 minutes at a time. Last night we came home and our light bulb had gone out. The chicks were all piled up in a corner and one had suffocated. This first one to die had been the one that we felt was always a "little off". Today everything seemed back to normal but we came home to another dead bird. Both dead birds were australorps. Tonight another one of our birds is laying down a lot, wont walk around the box or when we let it out on the floor. Could we be doing something wrong? Our birds are still inside in a box, it is about 20in x 20 inch. We have a 60 watt bulb on them that we backed down from 75 about a week ago. It has been in the 80s during the day and 50s at night, is it time for them to transition outside?