Quote:
Originally Posted by
chickee 
I recently read a post on BYC about chicks around the same age of the two groups you are thinking about putting together and the older chicks killed the younger ones. I would wait until the younger chicks are a couple of weeks old before trying to mix them. They are fragile at 4 days old and need a different brooder temperature than the 2 1/2 week olds.
Good luck with them 
Quote:
Originally Posted by
zooweemama 
I am picking up some more chicks (from same breeder I got my other chicks from). They will have a 2 week or so age spread. Mine will be about 2 1/2 weeks old and the new batch will be about 4 days old. Will the new ones be ok with the older ones- or do I need to brood them separately. There are 6 now and I will be adding 9 more. (and I'm done getting any until next Spring maybe) Thanks guys!
X2. Yes, keep them apart until the younger ones are a week old or so. Accuweather says it's 85 currently in Redding with a low 65 today and a high of 104. We won't be that hot, but this morning none of my chicks were under their heater. Using the ecoglow has convinced me that we keep chicks too warm for too long, especially in those parts of CA where it is so hot. I bet my Garage did not go below 80 last night.
Last year a guy bought 200 chicks and split them up into a bunch of rubber maid tubs. After 50 of them died, he asked for help. He had a small batch that did not die so he thought the large scale system would work. He had the temperature too high in the brooder and the heat was killing them. That seems to happen more often than too cold.
Well after that sad news, the best thing to do is make a spot for them that is warmer than the rest of the brooder. The chicks will self regulate by moving into and out of the heat. If in doubt, set the temperature for the younger ones. Most importantly, watch them to see what they are doing. If they are huddling together under the light, they are too cold. If they are panting, staying away from each other away from the light than they are too hot.
So, size and the ability to stand up for themselves is the thing to look at.
Ok, just to show that I am not making this up
and that I have put together older and younger chicks, I am posting a picture of my GL Wyendotte with the two EEs I bought to keep her company. The GLW was Two days old when I put them together. The EEs are at least a week older, probably more. The GLW is two weeks old not, sot the EEs are 3 to 4 weeks old. I took this picture this morning:

Notice the ecoglow on the left. They were not under it this morning. I really hope the GLW is a girl 
I hope everyone has a happy Fathers day. I am cooking a Red Star packing Rooster in my smoker today.
Ron