Gallery: Bottomless bowls (of pet food)

E-commerce has changed the way pet owners get food and supplies for their furry friends. Thanks to a variety of online services, pet owners can get scheduled shipments of pet food, medicine and more, directly to their doors.

Among the options: Just Right by Purina, Petbrosia, Chewy.com, Wag.com, PetFoodDirect and Petco's Repeat Delivery.

Here's a look at what each offers.

Captions by Carol Angrisani