NEVER, EVER, BUY PETSMART EARMITE MEDICINE FOR CATS...WE BOUGHT IT TWICE, PET ARMOUR AND IT IS THE MOST WORTHLESS MEDICINE FOR EARMITES FOR CATS... WE USED IT FOR 3 MONTHS, MABEY 4 AND IT DID NOTHING...A TOTAL WASTE OF MONEY...I THINK THE EARMITES ATE THE STUFF...GO TO A REAL VET TO GET THE REAL STUFF...NEVER PETSMART.ITS A BAD SCAM FOR YOUR CAT...I WOULD BE LEARY OF ANYTHING AT THAT PLACE.