Hello, I'm 15 and my mom gave me four baby chicks. Recently they've been starting to get bigger and really jumpy in a big bird cage that I've put them in (it's like a 10 feet by 10 feet box). So, I put them outside in my backyard, but after a couple days the smallest chick (7 weeks old I think) has went missing. I couldn't find her anywhere and after closer inspection, I found a couple holes she could have slipped through. I don't think this is the case though, because they always stick really close together. So I kept on looking and I spotted a rat on the fence. It wasn't very big, maybe 3-4 inches at max. I've never seen one near our house before and I was wondering if they're interested in eating chicks. I hope this isn't the case but I'm dying to have a response. Would the chicken run away or is it possible a predator killed her? I've looked everywhere (I spent a good 6 hours looking this afternoon) but I can't find any signs of struggle or her body, or any trace.