8 month old St Bernard- need help
I have an 8 month old St. that is getting aggressive toward other dogs. I feel it's a dominance issue because we have a Boston terrier and they are great together. She was a rescue and grew up with other dogs which is a bit of a surprise.
I recently had a friend dog sit with two Nuefanlands and she was aggressive at first until she was put in her place then was fine. Another time I came home and she was outside playing with a friends malamute. As soon as I stepped out of the car she got protective and got agressive, the malamute pinned her and she was fine after that.
Today when I came back to pick her up from the friends house with the two Nuefanlands, she got loose and immediately tried to attack the neighbors dog. It was broken up by the owner and she put her tail between her legs and came back to me. Any help would be very useful. She is doing well with obedience but I want to fix this before she gets too big and hurts or kills another dog.