I buy almost everything at chewy.com. My vet has a short list of safe places to order from online posted, and chewy.com is on it. It usually takes no more than two days, and with a $49 purchase, shipping is free. Otherwise, it's only $4.99. Their customer service is wonderful, and their prices are cheaper than the chain stores. I buy toys and first aid supplies there, too. There is no sales tax except for Nevada, Florida, and Pennsylvania.
Hill's Prescription Diet Dog - Free Shipping at Chewy.com