You could try squirting him with water in a squirt bottle while saying a firm "No" when he does it but I fear for the new puppy not only could he hurt her but he could also do damage to her having fear issues. I would not waste any time and bring in a trainer who is good with aggression issues. I also would not leave them alone together.
__________________  Taylor  My babies Joey, Penny , Ollie & Dixie   Callie Mae, you will forever be in my heart! |