I have my 4 week old and my 2 week olds inside with a heat lamp at night and I take them outside during the day. I have 15 babies in all and they huddle together if they get chilled. The temps here are 85 during the day and 69 at night. I am not as concerned about the temps as I am predators. My husband has killed 2 rat snakes in our yard this month and I have seen a fox in my yard 2 mornings in a row. So, I don't want the babies out at night until they are older. They LOVE it outside though. I have put some limbs into their run and they are "flying" up onto them as though they were trees...SO cute! I wish I could sit outside all day and just watch them! What kind of fencing can deter a fox? I want to find a solution before I take these babies out to stay.