PetSmart shakes up the internet world with a huge Anniversary Sale this week. Treat pets to everything from supplies and over the counter meds to treats and toys that have new and reduced prices. In addition, these coupons will also come in handy: Code BDAY7CAT13 for $3 off orders of $10 or more, code BDAY7DOG13 for $4 off orders of $15 or more, code SAVEUPTO20 for $10 off $70, $20 off $100 or more and $1.99 shipping on orders of $49 or more. Coupons expire 08/04/2013, 08/04/2013 and 07/28/2013 respectively.