Hello All, I have had my chickens for about 10 months, and they are about a year old. They are a group of five sisters, and a cross between White Leghorn and Rhode Island Red. We live in town, but we have a large backyard and let them free-range during the day. During the first week that we had them one of them escaped from the yard, but since they we haven't had any problems. However, over the past few days the chickens-all 5 of them- have been escaping from the yard. I found a hole in the fence, which is what I thought they had escaped through, and fixed it, but they still managed to find a way out the next day. This really concerns me because one, it is difficult to round up the chickens and takes a lot of time out of my day, but more importantly, it is not safe for them to go wandering around the streets of town. They are also a very tight knit flock, so they all go together when they escape. I am wondering if there is some physiological or behavioral reason that they suddenly feel the urge to escape from the yard? They have never done this before, in the 10 months that I have had them. Any ideas? Thanks!