Hello, I'm hoping someone will be able to help. I have a 3 year old entire male who sadly lost his brother last year. He seemed to be doing fine after, but now seems lonely and depressed. I would like to get him another friend, but unsure as to what would be best? The only problem I have is just before his brother died, they recently started fighting, so I don't want my current guinea to fight with a new one. Any tips really appreciated!