What is your opinion on a growling puppy?? She is four months old and usually very sweet. She has growled once at me (about two weeks ago) and I firmly said no and put her in her crate for 20 minutes. Tonight she growled at my husband when he stopped her from going inside to wipe her feet (she likes to dig). He said that he just said no and let her go. She also will growl at her doggie friends if they touch her while she wants to sleep. She has been in puppy class ONCE, but has since came down with kennel cough and so we are waiting for that to clear up before we go back. I just do NOT want an aggressive dog as I had one as a child and it was horrible. What do you think? Should we do anything more?