can the cold weather change the weight gain?

[momofchicks]

I have raised several batches of the same birds and this time is the first time in this cold of weather. Normally at 6 weeks I will get processed birds weighing 3 1/2 to 4 pounds, this time they were 2-2 1/2 pounds. So the only thing different was the cold weather, did they expell so much energy trying to stay warm that they didn't gain the weight? I had two heat lamps on them at all times. What's your thoughts? Thank you!!

 

[Oregon Blues]

They will burn energy keeping warm, so they will need more feed in very cold weather. It shouldn't slow down their growth as long as they are getting enough food. Give some extra carbs when it is really cold out.

Hot weather can slow growth because it affects their appetite.

 

[OldChurchEggery1]

I've heard that giving corn at night time helps them have quick energy to stay warm overnight, both for meat birds and egg layers. It was in an issue of Backyard Poultry this year, though I can't remember which month.