I noticed blood on the deck yesterday, and after inspecting my 4 gals, I found the injury. One of my hens is missing a claw. Her "fingertip" just ends in a bloody stump. She is not bothered, happily scratching about in the newly arrived Wisconsin spring weather. Doesn't appear to be bleeding a ton, but not exactly a nice scab. Any advice for care? Does she need to be separated? (they were all in the coop last night and are fine this morning.) What could have happened to her??