OK...birds are about a month old, and have been in a 18" high 6' cardboard brooder ring in the basement. Well, the brooder ring has become all but obsolete as the birds just plow it over and wander around my basement. Their feathers are in, but sparse in a place or two, but I assume it will be ok to take them off the light for now. Now here is the tricky part...it's still pretty cool here in the Buckeye state, and they are needing moved from my once pristine basement to more permanant housing. I assume with the colder nights I will need to continue using heat bulbs at least to some degree, but I need to build the pen this weekend and get them moved in...for 5 broad breasted white toms, about how much room should I allow, and what is there tollerance to temperature shifts? i.e. it was 85 the other day, and in the lower 50's today, not to mention night lows in the lower 40's. Suggestions? We have had a great number of folks complain about the birds we got this year being unthrifty and dying off...mine are well over industry standards at the moment and doing great, but I'm afraid if I don't keep them near the water and food they won't stay that way for long...any advise is appreciated. Thanks!