Hello, I have two Guinea Pigs, Patchy and Gizmo. They are Males. Earlier Today, Patchy passed away, this means that my other Guinea Pig Gizmo, may be subject to depression. Me and my family are discussing whether to buy a new male Guinea Pig Baby or Older Guinea Pig. I'm not sure about this, because they may fight for territory, as they were not from the same Litter. What should I do? Should I keep my Guinea Pig alone, or buy a new Male? Please reply. Thanks.