If your hen is like mine, it's a clicking/clacking sound like two little boards or sticks hitting together and has nothing to do with her mental state. She can hardly get anything in her beak or hold on to it, and i mean anything. her favorite mealworms drop right off, her lettuce is flung but not taken into her mouth, she is trying but barely gets anything in. The vet didn't know what was going on. I had a friend who has a large flock come and check and didn't see that anything was wrong with her beak, tho I did trim a teeny tiny bit off in hopes it was that. I am frustrated for her. I posted her story over in Help Flystrike but no one has replied with any help. No avian vet to see around here. This forum saved my hen's life from our first event with fly strike!!! Going on 2 weeks out from death's door to walking again, but still can't do well with her beak. lots more to share but i'm taking up a lot of space here.....thanks for reading.