I do not correct for that. When Seger is unsure of something and hackles up, I get VERY happy.
What is THAT??!! Let's go SEE! Good Boy! Look at this! You're a rock star!
He has solid genetics and apparently a lot of trust in me. As soon as I put my hand on whatever it is he's unsure, it's all over. He sniffs and moves on.
Don't force him into situations. Keep things as calm as possible. My vet is the best because both of the guys just ignore the dogs, toss them treats, while they talk to us. They let the dogs approach them.
People that come over, just toss treats, praise him. Make it a game. They love games.