i hve a 18 yrs old cat he has been with me for a while he has developed hearing loss but loves to eat! he has developed a food alergy on the top of his head abouve his right eye , that is scabby for the lst couple of years it is now spreading over his right eye , he has a problem seeing and hearing I love him so much this morning i noticed a dark spot on his back i pulled what little hair he has and i was a cluster of fleas he wears a flea coller but it looks like it is going up his back !!! i concerned , on what to do help !!!!!