Last week my chickens were attacked by dogs. We only lost one but a second one was bitten and injured. She limped and took it easy for a few days but five days later she behaves like she is back to normal. She hasn't laid but I figured that would return in time. That was until today when I noticed a strange bump on her back above her left wing. I know this pictures aren't great but I guess she isn't very photogenic Her back also seems lopsided. This might look like a picture from a bad angle, but it's actually not. Any ideas of what could be wrong? She doesn't appear to have an infection but I'm clueless as to what could be wrong.