Hi there! I just purchased the xl guinea pig cage for my three male guinea pigs. They are approximately 9 months old. They have been living together since birth but in the past couple of months I've noticed the biggest one nips and chases one of his brothers resulting in the poor little guy missing half his back hair. The littlest one of the three is blind and deaf and the two bigger ones leave him alone. I got the cage divider and I am wondering if it is ok to seperate the bully from the other two. I don't want him to get depressed and lonely, but I also don't want to see him hurt his littler brothers. Is there a way to do this so none of them are compromised? Thank you!