I used to have nothing but trouble with my local post office. It was a fight to see if they could find my eggs. Then to be spiteful, they would start "finding" them at 4am and they would "call for pickup".
I worked so hard at developing a relationship with a mid-level employee. He now goes out of his way for me. They call at a decent time, they place my egg boxes on his desk, if it's way outside of hours they have me come in the employee door. In exchange, I always smile, I bring eggs, I bring pictures of the breed that are in the box so they can see what they have handled.
When I get live birds (not too often), I've got the guys used to looking for my name at the West Sac hub and at the airport. They don't know if I'm expecting birds, so I think they look at every live bird box and check for my name. I've gotten calls from the airport at 8pm. "Hi, this is Jessie at air cargo in Sac. I have birds here for you, did you want to come and get them?" Even if I'm already in my PJ's, I want to encourage that behavior. I say absolutely, jump up, get dressed and head out the door with a dozen eating eggs in my hand. It's only 3 hours RT
and saves my birds another 12 hours in the box in some huge warehouse. I don't ever want them to think the birds aren't important enough to me that I wouldn't drop everything to go after them, even if I know the birds would be fine (last time they had only left the shipper about six hours earlier, they would have been fine, but off I went to the airport.
When my box of goslings were "found" in the West Sac sort facility. They had me go down, drive in the employee entrance ("just don't tell anyone you don't work there"), climb up on the loading dock and go in the employee door. I had four guys escort me through the HUGE facility because they all wanted to see the babies (and tell me stories about seeing baby ducks when they went kayaking, LOL).
I have worked SO hard at culturing these relationships, if I can just get my shipments into northern California, then I have them on my side.