In May I adopted a black GSD, she was a police dog in Czechoslovakia but failed a test. A couple brought her to Montana. My shepard mix was 12 years old and she had Cushings Disease and passed away. I found my Zoya on Craigslist. She is a really sweet girl, but when she sees another dog She goes bulistic. They told she was high prey drive, but when I brought her home, I have six cats. My 11 week old kitten put her in her place and she is great with my cats. But dogs are a different story. Does anybody have any suggestions to turn my dog that wants to kill other dogs into a well mannered dog that I could take to dog park and the river and have to worry about her attacking another dog?