My cat is 14 ish .. Always been well but his back end has been a bit wobbly the last week or so . When he washes or shakes he wobbles , also going down the stairs he wobbles . Not falling over as such just wobbles . I have been watching him the last few days to see if its getting worse which I done think it is but not getting better . I will probably take him to the vets tomorrow but wondered if anyone had any ideas what would cause this .