LOL! I believe it. Kanga is good for Roo!
By the way Tamme. I think Kanga will grow out of sucking on Roo. When we got our three boys my Jake would do the exact same thing to his brother Sebastian. It was sooo loud and it kept us awake at night because they always slept in bed with us.
He grew out of it and no longer does the suckling. Good nights sleep ever since!