Last year my friend bought her daughter a single guinea pig. It lives on its own in a cage which is bad enough but now apparantly, none of the family bother with it.
My friend said the daughter got fed up of it and now only interacts with it when she's changing its food and water. They have shoved it in the greenhouse.
I just feel so sad thinking about the poor thing sat on its own day after day. Its such selfish behaviour but they don't seem to realise or care.