We have one male pig, he is right about 3 years old. Sadly, when we got him we truly didn't know much about giunea pig care and the importance of them having a cage mate. Recently my son and I have been trying to learn more about them to give our little guy a happier life. I just wondered with him being a male and alone now for 3 years, is it a bad idea to introduce him to a friend? He is definitely not aggressive (to us) but still a little skiddish.