The latest trend in the sharing economy is dog-sharing. No, dogs aren’t being passed around for free, but there is a flurry of startups offering dog-walking, dog-sitting, and other dog-related services. These apps give people the opportunity to become pet owners despite the challenges of modern living and allows anyone to offer their dog-caring services. The services are proving to be a booming business, with one app raising $19 million in funding in just the last two years.