How to move outside?

[derby]

A friend just dropped off 2 chicks. They are supposed to be 34 days old. They have feathers and are just starting to cluck. They spent so much time scratching in their cage, I put the cage outside so they could have some dirt and grass to scratch in. Do I have to bring them in tonight? Temp during the day is mid-70's, but it drops into the 40's at night. Could I just cover them with a blanket to help them stay warm at night?

Thanks.

 

[eggzettera]

40 degrees is still too cold
1st week @ 90
2nd week @ 85
3rd week 80
4th week 75 well you get the idea...

Yours are at the 5th week so no lower then 70, so in at night...