Schnoodle nipping, please help

by Trudy
(Bismarck ND 58504)

I have a 1 yr old schnoodle that we're having trouble of him nipping people - whether we are out walking or people visiting, especially small kids.
I've had schnauzers before, the 1st one would push people with his nose,.
The other was the perfect dog so I need help I don't want someone to get hurt & lose my dog