Hi I am a new cavy owner. I have owned my black guinea pig Darwin for 3 months now and so far he's proven to be a handful. I started him out in a glass aquarium but them built him a 5'x3' c&c cage. I use fleece as bedding and he has a hay rack and a few hideys and toys. He knows feeding time is in the morning and always wheels at me until he gets food. I want to get another male to put in the cage with him but I am so afraid they won't get along!!!! Does anyone have any advice for me as far as care, toys, or introductions to new cavies???