my dog ( 1 1/2 year old small mix terrier) is a sweet guy when it comes to humans and dogs he is familiar with. sadly, he has picked up aggressive behaviors from my brothers large dogs. He will growl at people he is not familiar with on the street and when they enter the home. he will growl at outside noises and also at other unfamiliar dogs. he doesn’t bite people he just growls and when they try to pet him he runs away and gets shy. minutes will pass and he will warm up to people. he does fine at the dog park, when a dog approaches he smells the dog and runs away( which makes sense, he is a small dog) i’m more concerned when we go on walks. i’m looking for advice and tips i can do to help me and my dog work on his excessive growling. i would love to be able to go on a walk with him and be able to pass people without him growling and he can just keep walking.