Schnauzer barks at people without dogs
just re-homed a mini schnauzer - 3 year old boy. well trained, obedient but with one serious problem - he likes all other dogs but not people without dogs. When we meet people with dogs he is fine, without a dog he may seriously bark at them. There's no pattern - mew, women, with or without bags, sticks etc. Not always but when he does t can be serious problem. Any suggestions would be really appreciated.
NOTE FROM LINDA AND MAX: This is unusual behaviour and obviously something has triggered it, but not knowing fully his background, it is not easy to know why.
He is obviously suspicious of people without dogs. We would try walking him around and getting some dog-loving friends to walk past him - if he barks, make sure they act in a friendly way towards him and make a fuss of him so he learns he has nothing to fear from unaccompanied humans.