Samantha will do this really cute, frantic type of howl when she's outside and hears something but cannot see it. She throws her head back and in a very high-pitched girly howl goes, "Ah-WOOOOOOO! WOOO-WOOO-WOOO-WOOO-WOOOO!!!" It's really cute... except when it's like 1 o'clock in the morning...

Other than that, she'll bark at things she CAN see when she's outside. Inside, she's pretty quiet unless I'm giving her a snack in which case, she knows my favorite command is "BOOF!" so she'll bark then.