"Hello" is a bad word.

Freddy, the wiener dog, is always on guard duty.  Freddy has a particular sharp bark for arrivals - "I'm on guard duty here." "Who is it?"  I just noticed that it includes the word "hello."  Nana called and Eric answered the phone, "Hi Nana."  No response from Freddy.  When Eric handed the phone to me, I said, "Hello."  This prompted Freddy to come charging into the room with his "Who is it?" bark.  He wouldn't stop.  I kept saying, "Freddy, it's okay. It's Nana." but the barking continued.  Finally, I put the phone to his ear so he could hear her voice -- the barking stopped.  Thanks for being on alert, Freddy, but I've got this one.