I have been a guinea pig owner for over 5 years and I know guinea pigs need to be kept in groups. The problem is that a certain boar that is very aggressive to any other pig it comes in contact with. The guinea pig Cinnamon has been carefully introduced to 3 other male guinea pigs all one baby on the same age and one senior. Cinnamon has drawn blood on all of them wither that be biting or scratching. When Cinnamon is even in the room with any other guinea pigs mine or those I encounter at work (I will work as a vet assistant so I will take him to work some times for vet visits or nail trims) he freaks and ends up trying to escape and attack the other guinea pigs. Cinnamon is the least stressed when she is keep alone. I have been trying over and over again to introduce him to a guinea pig that he will get along with. I got Cinnamon as a baby off of craigslist and he was in a bad situation he has injuries that he will have for the rest of his life. He was with his brother and they were being feed seeds and there water was brown. I was only able to take Cinnamon because even then it was obvious that Cinnamon and his brother did not get along. I asked that the man turn the other g pig to the local shelter or guinea pig shelter. Cinnamon was then raised by one of my male guinea pig who is amazing with orphaned g pigs. A few months later Cinnamon started attack the other guinea even drawing blood. Every time I tried to introduce Cinnamon a guinea pig she attacks them drawing blood and is noticeably terrified. Cinnamon seems to be much more happy to be with people. She loves any person that comes around and will cuddle with me. It seems like Cinnamon may not ever get along with other pigs. I feel very bad that I can find him another guinea pig to bond with but I'm not sure that bonding him is the right thing. He lives in my room and get a ton of attention even though I know that I cant give him what another guinea pig could. Dose anyone have any opinions or ideas I really just want him to be happy.