Help- Aggressive Yorkie
 

I have a 4 yr old female yorkie- Spayed in Jan 2010- Hoping to decrease aggression. It did nothing. Prior to her 2 litters she was very well behaved. Since her second litter x1 yr. ago she has been an aggressive beast. Total of 3 puppies keep from the 2 litters. She is not teaching the youngst her bad habit. I have 2 yorkies Cozy (4/mom) and Roxy (2.5/daughter) and my parents have 2 yorkies Zoey (2.5/daughter/Roxy's littermate) and Lucy (1yr/daughter). After her 1st litter Cozy was very protective for 6 mon. and then went back to normal behavior. Since she has had Lucy's litter she will not let anyone on my parents property or into their home. She is better when at my home w/ me. My parents watch her 3x/wk while I am at work. They can't trust her w/ others. She scares by parents on neighbor and he runs which is only making her behavior worse. Have spoken w/ several dog trains- Most freq. recommendation is have my parents take her for basic obedience. She knows basic obedience and my parents won't do it. I don't want her to bite someone but they also can't be forced to not have pple. over. Removing her from the situation does not work- Will bark and whine nonstop. Please I need a really good dog trainer in Hunterdon County, NJ w/ experience w/ aggression. I have to stop this behavior. I work +12 hrs 3x/wk. (7p-7a) Boarding/puppy daycare is not an option and neither is dog walker. I'm now afraid to leave her w/ anyone else b/c of her current behavior.