We're all familiar with the old "dog bites mailman" cliché, but it turns out not all dogs have it in for their local delivery people. In fact, it appears quite a few have formed deep attachments to their parcel couriers and are absolutely overjoyed when the local delivery truck pulls up.

For evidence, you need look no further than "UPS Dogs," an online community in which UPS drivers can share photos and videos of all the furry friends they meet on their routes. Nearly 350,000 people follow the popular "UPS Dogs" Instagram account, which features photos of happy dogs with wagging tails, goofy grins, and lolling tongues—including a few of eager pooches trying to jump on board the Big Brown truck. And it's not just dogs. Scroll down far enough and you'll find a smattering of photos of other critters: a spotted fawn, a pinto pony, a wild turkey, and even a horned goat and a pair of lambs.

For those who just can't get enough of these adorable pups, there are companion "UPS Dogs" accounts on Facebook and Twitter. Federal Express drivers have their own Instagram and Facebook pages as well, though they boast far fewer followers.

Atlanta-based UPS Inc. says it isn't officially affiliated with the popular site but points out that it shows the tight connection between customers and delivery trucks. "We have several dog-loving drivers with personal social media accounts dedicated to celebrating the pets they meet," a UPS spokesman said via email. "These are great examples of the strong relationships UPSers build with their customers, both two- and four-legged."