Any difference in weight gain as far as seasons?

[the simple life]

This may seem dumb but what the heck it wouldn't be the first time I asked a dumb question.
When raising cornish does anyone notice if there is a difference in weight gain between the seasons?
I was wondering if they burn more calories one way or the other, maybe trying to keep warm if its cold out or if they burn more in the better weather in spring because they are out moving around more.
Maybe in the summer when its too hot for them to do much and they just sit and eat they may gain more?
I personally don't want to raise any in the summer months for several reasons but was wondering if anyone ever noticed a difference in weight gain.

 

[TimG]

In a few of the reports I have read, it has mentioned that weight growth is slower in the early spring when there is cold weather. As you've suggested, I think this is because they burn more calories keeping warm.