We have two lovely labradoodles. 6year old black female and four year old brown male. Both lovely natured dogs . However the boy Oz is driving us all nute with his barking. Mostly a problem in the car. He barks from start to finish and literally trembles with excitement . At the end of the journey (mainly the moors for a walk but also on returning home) he tries to flee madly out the car like some mad scary barking banshee,totally out of control. Meanwhile the other one sits peacefully if a little deafened by the bonkers dog beside her. Short of a muzzle ,any ideas ?