I have three RIR who are about 9-10 weeks old. They sit in the coop all day and won't go outside. I've tried tricking them with treats but they'll just go outside to eat it and go back into the coop. I saw one of the chick eating a worm in the yard but they still don't care to be outside. They're outside maybe for 30 minutes total in the last 5 days. I'm not concern about the feed cost but I want them to get exercise and be happy. Should I just wait until they decide when to go out? Thanks.