Supplemental heat for chicks in summer

[GooseMoyo]

I've got 6 chicks in an outside brooder - they are ~3 weeks old. It hits mid-high 90's during the day but down to mid-low 70's at night. I plug the heat lamp in before going to bed and unplug it at sunrise. At what point should they be fine without supplemental heat at night?

The brooder is ~4x8 made of 2x2's and chicken wire (completely enclosed). I'd like to move it to inside the run for the rest of my chickens; they wouldn't have direct interaction with the adults...it's just more out of the way and more convenient to check on all chickens at once, but I can't get electricity to run a heat lamp that far. It's "annoying" but not annoying enough to spend the money on a longer extension cord.

 

[FarmerGirl101]

If they are close to fully feathered and in an area with no drafts or wind then you can stop giving them heat. For the first night without heat I would check on them once a little bit after dark to make sure they aren't cold but they should be ok.

 

[nuthatched]

They don't need any heat anymore at this age.

 

[GooseMoyo]

Awesome - thanks for the speedy replies!
I've got a cut out thick plastic container they can shelter in so they'll be safe from wind.

 

[kattabelly]

They would've been fine a week or two ago. Just make sure that they still know where to go to sleep and keep warm if you're moving them or changing their setup at all.