Consumer products know that until you enter your card details, you haven't made the decision. There will be a drop-off at that point. So this allows them to capture you in their system even if you don't complete the purchase. If you sign up after this, great. If you don't, then expect nurturing emails over the next few weeks until you come back and get the box for your dog.
The study also polled dog people about taking photos of their pup, and found that 20 percent of the pictures they take on their phone are of their dog – more than trips or vacations (15%), themselves (11%) or food (6%). In fact, more than two in five (42%) dog people have made a photo of their dog the feature photo on their phone or computer desktop.