If you purchase flea & tick medicine, if your pet is on a special diet, or needs prescription medicine, this is a nice opportunity to save $15 on your purchase. Pay $15 for $30 at PetCareRX. I actually use PetCareRX to buy my dog's arthritis medicine and they've got the cheapest prices I've found for this prescription (and I checked around). The voucher is available immediately after purchase, and doesn't expire until 12/31/12. Head HERE for details.