My youngest chicks will be 5 weeks old in a couple of days. I've been using a heat lamp a little each day with them maintaining the 5 degree temp drop per week. For the most part they don't need any heat during the day, but I still put it on at night as its been dropping down to the 50's - 60's and the current temp I'm trying to maintain is 75 degrees (will drop to 70 on Sunday). My integration with my 13 week old chicks is not going so well, in fact the older chicks seem to be getting more aggressive towards them as the weeks go by. All we can get so far are some supervised playdates, and the pullets are the worse. I'm starting to think part of the problem is that the big chicks bully the little chicks and then they go away (I take them back to the brooder coop in the garage after a couple of hours of watching and refereeing). So now the big chicks are learning if they pick on them they will go away. So that's why I want to move my brooder coop into the covered run asap, so that they never truely go away and they get used to them being near if not accessible all day long every day (some days I don't have time to supervise play dates). So now the question is the heat lamp thing. Our run is covered (or will be tomorrow), but since the walls of the run are hardware cloth, rain could still blow through and I don't recall the heat lamp being indoor/outdoor. So when can I put them outside with NO heat source? Looks like the lows will be mid to upper 50's over the next week with highs in the low to mid 70's. At 5 weeks old can they acclimate to those lows in a few days time? I realized today that if I just keep doing the 5 degrees less per week, that the outside temp is dropping as much or more per week and I'll never get ahead of the temp, so I'm thinking about just cold turkeying them off the heat lamp at some point, but when? Any advice on the integration or heating is most appreciated. Thanks in advance!