I've never read anything like that, but I think it has been true in Cincy's life. When we first got her, she was scared of noises. Sadie like to play with plastic bottles and the noise of that scraping across the drive used to send her into hiding. She got over that and then at about 10 mos., which happened to be 4th of July, she was afraid of noises again. She had heard lots of fireworks and was fine and then all of a sudden, one caught her attention and she ran to hide. She does a lot better know, but every so often a loud noise will scare her and she wants to hide again.