She's always been sensitive to certain frequencies, the higher the pitch the more the reaction, and I expect that. I think it's the fact she does it even when he's silent or just cooing quietly that gets me and it's just him. Say, for instance, if we sneeze she doesn't bat an eyelid but if he sneezes all hell breaks loose. I know it's just a time of adjustment and it's me that needs to learn to manage her so she can manage herself but I'm running out of tools. That thinking with your eyes sounds interesting. I might have to look into that too.