My partridge rocks seem to be getting picked on. They are inside most of the time and when outside seem spooky. when they are relaxed walking around they are OK but they randomly get spooky and run around which get my plymouth rocks and sex-links to start chasing them around. 1 of the partridge rocks seems to get along with the others until the others start to run around. Is this normal for this breed or are they just an odd bunch?