For the past 2 weeks one of my chickens, Jacob, has been giving me a lot of trouble when it comes to getting him out of the coop to go in the run. It used to be that both he and Claudie would sit in the front of the coop so I could lift them both out every morning and put them in the run. Claudie is still like this, but all of a sudden Jacob runs to the back of the coop where I can't reach him. I can't get him to come to me for regular food, and I can just barely get him to come with worms. Anyone have any idea why he might be doing this, or ways to make him go back to normal?