Is it raining there? How many quail are there? The more babies there are the warmer they will keep each other. I put some ( 6) chickens out at 4 1/2 weeks when it was 50* but they were in a small wooden coop box with lots of shavings I went out about 11 o clock at night and put a VERY large vinegar bottle filled with 140* water wrapped in a towel and secured - pushed it right up to all the pine shavings to create a secure nest. That morning about 5:30 Am when it was the coldest -before dawn I put in a fresh warm bottle and took out the cold bottle. Mine were fine- but maybe someone who knows Quail will jump onto this post and have a better answer specifically for quail. If it is going to worry you and you cant sleep sometimes it is best to let them go to sleep, slide out there and pick them up but them in a box to take back in for the night. Good luck