Yeah, I know exactly what you mean. I don't trust people, either. I've been burned a few times myself in my life when I was only trying to help someone and got a knife in my back. With chickens, they love to pawn off their "problem" birds on other people, like the one they say keeps getting a "cold". Of course, chickens don't get head colds like people do. But you and I know that. Sometimes, it's just plain ignorance of the facts and they have no clue they are about to cause a disease in someone else's flock, but I know auctions and flea markets are great places for nasty folks to sell nasty birds to others. And even NPIP is not a guarantee of good health so don't trust that, either.
ETA: I think I'm losing Xander. His crop is all doughy, refuses to go down.When that happens, or when it did with the big Orps, it was the crop just simply quitting. I've done it all, including the Colace. And massage is very hard because he's a little guy. Dang it. We adore that little guy.