Turbo started to Howl at about 4 months maybe 5, but we really encouraged it, we would howl at her for hours till she could mimic us, now i wish I hadn't done that. She has howled so bad she got us kicked out of our hotel, and our neighbors can hear her, but luckily they don't mind, she really only does it when she is playing or when she is really worked up. SO it is so awesome when they start doing it, and I still get a chuckle at the "O" her mouth forms, but I tell you once they start they don't stop.