My almost 3 yr old female Aussie, began showing signs of over protectiveness around 18 month and it has gotten worse from there. We worked with a trainer for a full year and have continued to implement the techniques learned working with her but whenever someone enters the house or yard, she goes ballistic.
The only exceptions are family and friends she knew well as puppy - other frequent visitors are still treated with aggression and she has snapped at a few people.
I have put her on a lead when people enter the house and in the past 9 months err on the side of just putting her in another room which makes me very sad.
She is a great, loving, smart girl with her immediate family (myself, husband and 6 yr old son) and I wish she could share this side of herself with others. Part of this issue is now also on our end as we are nervous that she may hurt someone.
I also notice she is worse when on a lead BUT I am not comfortable allowing her off of the lead when guests enter. She is fine at the vet and at a dog camp we take her to for socialization and exercise. Any tips you have would be greatly appreciated!
Aussie Behavior Problems? Australian Shepherd Lover's Guide To Australian Shepherd Training & Care