ive got a 15 yr old male russian blue,today hes started making meowing noises then keeps licking his bottom,normall when i stroke him his tail goes straight up (u know how they do it) but he wont do it now,hes not consipated,uses a litter tray.hes eating well n drinking normally.ill try n get him into the vets 2morrow (but hes very busy) any one got any ideas?? ive made him up a cosy box to sleep in,and ill keep the younger cats away so he can rest. other than that what can i do??forgot to add he hasnt got worms.