This is where you would add a blog post. Pictures from daily activities would work. If you have opinions about the business, dog parks, regulation, pet diet, certain types of toys, discipline, why you love Seattle, why you love dogs, etc... would go here.
Keeping a blog isn't required, but this day in age its a good idea, it keeps the site fresh and gives people (and the google robots) a reason to come back, plus it makes it look like you're passionate and enthusiastic.
Blog posts don't have to be novels, they can be as simple as a photo update. Speaking as a client, I love seeing photos of my dog at the park.