I've had a Jack Russel for about ten years now. I guess that would make her about eleven or twelve. A couple weeks ago, my dad took her for a walk, off leash, and she got into a culvert. Apparently there was porcupine hibernating in there, and she learned the hard way. We removed the quills ourselves, but just a couple days ago, she's been acting really weird. It's as if she's not even the same dog. It could be that she's just getting old. But I still think it's very odd for her. When ever some one goes to pet her, or lifts their leg around her, she squeals and acts as if you're about to beat her into submission. Which we don't, we've never beaten her. Maybe a soft kick in the but when she eats the cat food, but she's never reacted that way before. Just last night, I came down the stairs and she was at the bottom and wagged her tail at me, so I stopped to pet her and tell her she's cute. So she followed me to the kitchen where my mum was sitting in her chair. I went to sit in the vacant chair, and Twilight (who is not named after the series) happened to be there. I lifted my leg to sit cross legged in the chair, and she flinched, squealed, and ran away to her bed. I didn't even touch her. Now she ducks away whenever we go to pet her. Could it be post traumatic stress from the porcupine incident, or something more?