oh no! 💔💔 I hope she gets better soon. Normally when they can't move and can't pee properly anymore, you'd know. 

My boy is 12, and this year has been crazy - he was diagnosed with chronic kidney disease (CKD) stage 2 which has now progressed to stage 3, but still a very slow decline and i am grateful. I take him to the vet every week for his subcut IV, but because he hates dogs and loves cats its always very eventful session. He has never been sick until now - but this year has been kinds of problems from hematoma, mites. 

Once a month he has has muscle cramps and I give him hot massage every night. I also give him muscle supplements that comes with pain killers and have been driving him everyday to the park for a week so that he doesn't over use his foreleg. 

His food is also home cooked (always have been) and now i add cod liver oil, and 3x a week chia seeds, spirulina, folic acid. Than and his daily kidney supplements. 

Its been tiring, very costly, but he is a happy boy. He wakes up happy every morning. He plays with the cats, runs after the birds, assumes all strangers are friends, all dogs are enemies. He is very clingy these days. If I could give him 1-2 years more of just being happy, I'm more than happy. 

Have you done any blood works to see what's wrong ?