Thanks bunches ladies.
Thanks for the encouragement ESD!
Well, her mom laughed and said she thinks the baby gets the growling from the dogs. She's always been an "easy" baby.
Baby will quiet immediately now when I say "shhhh", if it were pain, I think she wouldn't calm down. Of course, she does do it on and off all day, mostly in the afternoon. She will do it if she's ready for a bottle, so I take that as her way of telling me she's thirsty. But she doesn't do it around bowel movements (which are regular, and soft, no issues with them).
I guess I just keep it up with the Shhhh, and hopefully it tames her.