A dog growls for various reasons: fear, offensive aggression, insecurity,
and play. Outside of play, growling serves as a warning. It is trying
to tell you that there is something wrong. Do not punish a dog for growling--give the dog a treat for the underlying cause to try to make the symptom disappear which is far more effective than having a dog suppressing it. Otherwise, a dog has no way to express itself. By not being able to growl, you have created a dog that will bite.
Professional Pet Sitting Services offered in the Upper to Mid-Pinellas County Area