Hello I’m a new member who created this account to get some advice on my 2 male guinea pigs behaviour. My two guinea pigs are 2 to 2 and a half years old (with them been rescues not 100% sure) my younger guinea pig Jonathon has been mounting and dominating my older guinea pig Biggie. I would normally worry about this but I noticed yesterday that there was a small tear in Biggies ear this has healed and does not cause him any pain so it must have been a few weeks or months ago. I have been advised to keep an eye on it and if it become violent and aggressive to separate them but I was wondering if I could get a more widespread opinion. Neither of them have been castrated but I have never had a problem with them mounting each other before. I hope someone can give me some advice. Thank you for reading and if you leave some advice then thanks also. I am open for questions if anyone needs to learn more.