My 4-m old kitty somehow got her back leg hurt 2.5 days ago. She's limping, appetite is fine though Kitty mostly sleeping, but sometimes climbing at the couch, just walking around, without using sick leg. When she laying around and stretching, wounded leg shaking a little, but i noticed, that she's tried to scratch herself with sick leg even. Can it be just a strain or something worse? She's got a lot of fear for an outside and it's not pleasant for her to travel for a vet.