Cheapest Places to Buy Dog Food Online: Price Comparison Guide

Where you buy dog food can swing your monthly cost by 15-30%. We've compared prices across Chewy, Amazon, Petco, PetSmart, Walmart, and Target for all 8 major brands. Here's who has the best deals and when to buy.

Quick Summary: Best Retailer by Brand

BrandCheapest Retailer30lb Bag PriceBest Saving Method
PedigreeWalmart$32Walmart everyday low price
IamsChewy (Subscribe & Save)$45Auto-ship saves 10%
Taste of the WildChewy$56Subscribe & Save + bulk bags
Purina Pro PlanAmazon (Subscribe & Save)$62Amazon S&S 15% on 5+ items
Blue BuffaloPetco (Pals Rewards)$67Points + frequent sales
Hill's Science DietChewy$68Auto-ship + price match
Royal CaninChewy$79Widest selection, auto-ship savings

Detailed Retailer Comparison

Chewy.com — Best Overall Selection

Chewy is the go-to for most dog owners. They carry every major brand in every formula. Prices are competitive, and their first-order deals are excellent.

Subscribe & Save saves 5-10% on recurring orders. You get free shipping on orders over $49. Their customer service is also legendary.

Amazon — Best for Subscribe & Save

Amazon's Subscribe & Save offers 5-15% off. The sweet spot is five or more subscriptions in a month, which unlocks 15% off.

Amazon often has the best price on Purina Pro Plan and Iams. Prime members get free shipping. The main downside is a limited selection of veterinary diets.

Petco — Best Rewards Program

Petco's Pals Rewards gives you $10 for every $100 spent (effectively 10% back). Their Vital Care subscription ($19/month) gives you 20% off all nutrition purchases and unlimited free delivery. Frequent sales (buy 2 get 1 free, 30% off) can stack with rewards.

PetSmart — Best for Treats & Supplies Bundles

PetSmart's Treats program gives you points on every purchase. They price match Chewy and Amazon. Their "Buy 3 Save $10" promos on bags are common. Free curbside pickup for same-day needs.

Walmart — Cheapest Everyday Prices on Budget Brands

Walmart has the single lowest price on budget brands like Pedigree and store brands. But for premium brands, they're rarely the cheapest. Their online selection is smaller than Chewy or Amazon. Free shipping on orders over $35.

Target — Best for Small Bags

Target's online prices are competitive for 5-15lb bags. Their 15-30lb bag prices are usually higher than Chewy or Amazon. Circle offers and RedCard 5% discount help bridge the gap.

Money-Saving Strategies That Actually Work

Strategy 1: Buy the Biggest Bag

The price per pound drops significantly with larger bags. A 30-40lb bag typically costs 28-44% less per serving than a 15lb bag. If you have the storage, always buy the largest size.

Strategy 2: Stack Subscribe & Save + Credit Card Rewards

Combine Chewy auto-ship with a card that offers 5% back on pet supplies. Good card options include Chase Freedom or Amex Blue Cash Preferred.

Strategy 3: Time Your Purchase

Major sales happen around: Memorial Day, July 4th, Labor Day, Black Friday/Cyber Monday, and post-Christmas. Stock up during these periods for 20-30% savings.

Strategy 4: Use Price Match Policies

Petco and PetSmart both offer online price matching. If Chewy or Amazon has a better price, show it at checkout. Chewy also offers price matching on select items.

Strategy 5: Check Manufacturer Coupons

Purina, Hills, and Iams regularly offer $5-10 off coupons on their websites. Some also have loyalty programs that mail coupons to subscribers. These stack with retailer sales.

Should You Buy Prescription Food Online?

Yes, you can buy prescription dog food online. Consider these key steps when purchasing:

  • Provide a prescription: You must submit a valid prescription from your veterinarian.
  • Vet verification: The online retailer will verify the details with your vet's office.
  • Cost savings: Online prices are typically 10-20% lower than in-clinic prices.

Know Your Dog's Food Cost First

Use our calculator to find out exactly how much your dog needs per month, then compare prices across retailers.

Calculate Your Dog's Food Cost

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Reviewed by Dr. Sarah Mitchell MSc Animal Nutrition, Certified Pet Food Advisor (CPFA)

Data sourced from American Kennel Club (AKC) breed standards, ASPCA pet nutrition guidelines, AAFCO nutritional requirements, and American Veterinary Medical Association (AVMA) nutritional guidelines. Our calculator uses the veterinary-standard Resting Energy Requirement (RER) formula. Last reviewed May 2026.