Seeking a trainer! In the last few months, our 3 year old pit mix has become possessive of her food, her toys, and her owners, when around other dogs. On several occasions she has barked at, lunged at, or chased away other dogs. She never directs this behavior toward humans, and is our only pet, so we only see the behavior outside of our home. Can anyone recommend a trainer who can help us correct this possessive behavior? Thank you!