Q. My cat is having a severe twitch in tail. Even in sleep. She is scratching and biting herself and she hides. She also has excessive thirst
A. I would initially make sure that you have treated for fleas with a good quality flea product from your vet as over the counter ones are not as effective. If you have ruled this out it could be due to allergies or dermatitis. As she is drinking excessively it is worth having her checked over by your vet and a blood test or urine test done to rule out kidney issues, urinary problems or diabetes.