We found Holly on Christmas eve 2008. No one ever claimed her. She is about 45 pounds and a German Shapard mix. Holly is the kindest, sweetest dog you would ever want to meet 99.9% of the time. She loves kids, other animals and just loves puppies. She will sit, give paw and roll over and stay. We have always had multple dogs since we have had Holly. We used to have a Cairn Terrier (Piggy) that weighed about 25 pounds. Piggy and Holly would get into horrible fights every few years, always when Holly was coming out or season. Piggy usually got bitten up but he still fought back. We always thought it was Piggy trying to be dominant when clearly Holly is the alpha. Piggy passed away a couple of summers ago, we thought that would be the end of the fighting. My stupid hubby threw a piece of meat by the dogs and the little 10 pound poodle mix tried snatching it, next thing I know Holly has Snowflake in her mouth shaking her by the neck. We didn't have any water on hand so it took me and my husband hitting and yelling at Holly to finally let go of Snowlflake. We took her to the vet and Holy had just missed her artery in her neck. This was about a year and a 1/2 ago. That brings us to this past week.We currently have 4 dogs. Holly, Snowflake, Airrie (Wheaton Terrier) and Tiffany a rescued large Yorkshire Terrier. Tiffany is 4 years old and we just got her in September. Tiffany isn't very submissive and I was worried Holly and flip out on her, but this time as far as I know Holly isn't even in season. Tiffany was sleeping, Holly just trotted over to her and attacked her. My poor daughter was home alone, and she thought Holly was going to kill Tiffany. She was punching and kicking Holly but she wouldn't let go. Finally she lost grip of Tiffany and Tiffany went running away. I am so sorry this is so long but I just don't know what to do with Holly. Put her to sleep? God I would hate to do that. Have her spayed? She is pretty old. I was wondering if filing her eye teeth may help? Please if anyone has any suggestions let me know.