HOW TO TELL IF A DOG IS BEING AGGRESSIVE
http://sitmeanssit.com/dog-training-mu/austin-dog-training/how-to-tell-if-a-dog-is-being-agressive/
ASPCA - AGRESSION
http://www.aspca.org/pet-care/dog-care/common-dog-behavior-issues/aggression
UNDERSTANDING AGGRESSION
http://4pawsu.com/understandingaggression.html
WHAT DOES AN AGGRESSIVE DOG LOOK LIKE?
http://www.responsibledog.net/aggressive_dog_indicators.html
UNDERSTANDING DOG AGGRESSION - CESARSWAY
https://www.cesarsway.com/dog-behavior/aggression/understanding-aggression
WARNING SIGNS OF AN AGGRESSIVE PUPPY
http://www.dogsbestlife.com/home-page/dog-training-warning-signs-of-an-aggressive-puppy/