1. Free Shipping

Free shipping is offered on most orders over $150, although for some dog and cat foods, there is still a shipping and handling surcharge.

2. Get the Newsletter

When shoppers sign up for the newsletter, they receive a discount to use on their next order.

3. Get Social

Following on Facebook and Twitter lets shoppers be among the first to know about deals and sales. They may even receive the occasional exclusive coupon code.

4.Check the Blog

The Muttropolis Blog also posts about deals on the site, with more coverage than Facebook or Twitter.

5. Join the Club

Joining the Buying Club offers a range of savings, starting with 10% off the first order. Members earn mutt points at a rate of one per dollar, 500 of which are worth $25. They also gain access to exclusive deals and a discount on a monthly treat, as well as a 20% off bonus for birthdays.