I didnt recognize Crippy at all when i first saw her with her injury and someone in the office neighbourhood claimed that she was new. So i cant help at all with determining her age.
I saw Splitty this am and he/she was scratching and im sure she has caught something from Crippy so would be good to treat her sooner than later
I have yet to see another squirrel scratch but I will keep an eye out for it!