Robin kennesaw, Georgia 3/17/2015 3:38:07 PM I have a 15 month old yorkie named max he is a great dog ive had 2 previous yorkies..he shows aggressive tendencies running around the back yard he will bark if im not with him. He jumps up and bites the air..we recently adopted a puppy and now he shows aggressive behavior towards the puppy. Hes very protective towards my grandaughter shes 5 she loves to kiss and play with max but i am afraid he will bite her in the face.I am maxs master.but their are 5 of us in the household.He no longer listens to commands from me hes all over the place. I take him for walks most evenings so he does get plenty of excerise. Out of the 4 yorkies ive had max is literally hell on paws! I need some suggestions to put max back on track with me as his master before things get out of control.