my female ragdoll cat just wants to lay down. when she does get up, her walk is weak and slow. her pupils are large. she is 10 or 11 years old and is spayed. she is the only pet except for a dog and some fish that live outside. she is an indoor cat. she is taking short heavy breaths. she got over a short cold about a week or two ago. when i grab her back leg, which she hates, she hardly resists. she was acting this way last night. when i woke up this morning, she was laying behind the christmas tree that keep out all year and decorate for the different holidays and seasons. i do not know what is wrong with her. do you know?