If you are referring to Bertie, she was grumpy because she wanted to be an only kitty. She was suffering stress from abandonment and was dealing with 5 other kitties. I'm sure there are numerous posts in General or Cat General about her (Oct 2011 - Dec 2011). She ran and played despite her weight and wasn't in pain. she was happy with people. My friends and I do not think she was abandoned because of behavior issues.
Originally Posted by kitten645
But in general you are correct. That much physical trauma can make an animal act out. Pain is not an easy thing to live with. This is sad.