There’s one thing that all UPS drivers will agree on: you never know what the day will bring. These people encounter some of the funniest and most remarkable things on their routes, and sometimes they’re even accompanied by some loyal four-footer friends.

Judging by this amazing set of photos, it looks like pups are always happy to see the UPS drivers arrive at the doorstep, and the same can be said vice versa as well. Whether it’s meeting a new canine friend or saying hello to a pup they’ve known for years, animals always manage to make their days a little bit brighter.

And for good reason! Just take a look at a compilation we’ve made of the best photos UPS personnel has taken on their delivery route. The tradition of taking animal pictures on the delivery routes was started by Sean McCarren, and it didn’t take long before a bunch of his colleagues followed. In any case, be prepared for a cuteness overload.