Today she was completely normal. She was running around out side, running upstairs and doing all the stuff she normally does. Out of nowhere this afternoon, she wouldn't walk and lay down in her bed. Every time I try to pick her up she yelps. I have no idea what is wrong with her. I took her to the vet a few weeks ago and they said that her knees were week and that they can easily pop out of place. I'm beginning to think that she has dislocated her knee? When she lies down her leg sticks up and it's in a very awkward position. Her leg is also shaking a bit. What can I do to make her leg better? I can't take her to the vet because it's night and the vet is closed. What else do you think might be wrong with her? Please help I hate seeing her like this she is in so much pain.