There are all kinds of stereotypes about dogs and... ...rival every day, so I can attest to the fact that postal workers and dogs can absolutely be good friends.
https://www.neatorama.com/2017/10/26/UPS-Drivers-Have-a-Facebook-Group-Dedicated-to-the-Dogs-on-Their-Routes/
UPS Drivers Have a Facebook Group Dedicated to the Dogs on Their Routes...
search took 0.016 seconds