I have three the same age. While I did put mine outside all day Monday and Tuesday, it's only in the high 50s/low 60s here in Chicago today, so they have been kept indoors. I'll put them out again in a few days when it warms up. But I will not leave them outside at night as long as the temps are below 70 at night since they are not yet feathered in.
Moving 19 chicks in and out of the house every night and day is probably too much work, though. I second the reommendation to put a lamp on them at night until they get a bit older and more feathered. Better safe than sorry!
Moving 19 chicks in and out of the house every night and day is probably too much work, though. I second the reommendation to put a lamp on them at night until they get a bit older and more feathered. Better safe than sorry!