[Stretch]

I got Pippi when she was 5 months old and I have no real proof that she was mistreated before I got her but I don't believe she had ever really been outside before and I do know that she spent most of her time in a kennel. She loves being outside, took me longer than usual to train her because she was so excited outside that she wouldn't want to waste time with her business. haha but it did happen and that's all good and she first attacked Yogi when she was 1 year old. Pippi is spayed but Yogi isn't. They are the best of friends all the time and then all of a sudden Pippi just attacks her. I know sometimes it has been jealousy so I make sure I give them the same attention at the same time but other times, it's just random, like if I let them both out at the same time, I think Pippi gets so excited so bites Yogi??? Otherwise they can both eat of the same dish, sleep on my bed together, sit together at the window, so I don't know what to do. The vet thinks she'll outgrow it because she has no health problems and never attacks my other BIG dog and my cats or my grandkids. Any suggestions that I can try, I welcome.