We're doing a late meatie project too. Ours are about 5 weeks old now, but we won't be butchering them until 11/28. I have noticed that they are a little slower to gain weight since the weather has cooled off. (Waaayyy off, we have a little snow here in Michigan today, thanks Hurricane Sandy!)
I'm also giving them a little more protein in their broiler ration. For us that's fish meal since I couldn't find any organic soy or peas to add.
I'm really having a tough time this year with loosing a higher percentage of birds than I have in the past. I'm using the same feed, same water, same enclosure, same pasture and same process as last year, but of the 175 I've grown this year, I've probably lost 30 birds. They seem lively and well, and the next time I go out to feed, I find 1-2 dead ones. That will go on for 2-3 days, then it stops and they're fine. I just can't put my finger on what's wrong.
Any ideas?
Last year I lost maybe 5 out of 175 birds.