Hi. Long story short, found a chicken scratching in some ivy / running around the sidewalks. Grabbed it to hold on to with hopes of finding owner but no luck yet. Has some sort of wound on back of neck. Have had it for over a day now, and seems to be losing lots of feathers, to the point where one of it's wings is forming a bald spot. Chicken seems to be moving normally / eating / drinking. I'm a former duck / chicken owner, but otherwise havn't dealt with many issues. Keeping it penned inside my house for now as we are expecting lots of rain here in Napa, CA, and don't want the wound to be constantly wet. Wound on neck seemed to be something a raccoon would do to me? Or could it be from being picked on by other chickens? Not sure how to proceed. Trying to do the right thing, but don't have a lot of time / money to devote. Dealing with probable flooding here in the next 24 hours. Attaching picture below. Thanks.