I thought she was dead

None of the 54 squirrels I've shot with my PCPs have made a significant noise after impact. The others I shot with PBs were quiet too. I'm not saying it doesn't happen but it must be rare. I've wished I'd brought the PCP with me when I went to go pick some up too, however. Like the one I shot in the throat. I'd have shot it again if I had the gun with me. But if fell again pretty quickly. I've never had to finish them off another way but I probably would have if I didn't have a dog.

I pressure cook them for an hour and they are always tender when I eat them.
That's about the only way for me to enjoy consuming them, low and slow. If I'm feeling fancy I'll boil it till it falls off the bone then throw it in some batter and deep fry'em. Letting it marinade in butter milk/vinegar/lemon juice is good too but It seems to depend on how old the squirrel is before it really breaks down the proteins and make it soft enough to chew on and I don't have the patience to wait a few days.