Spaying and Neutering Guinea Pigs
Guinea pig dominance(Signs, Behavior and how long does it last)
They learn how and what to eat, drink, or how to interact with other guinea pigs.
If someone is insistant on getting a lone guinea pig I would direct them to an older pig at the shelter or in need of a better home.
They usually establish a natural hierarchy, with the younger one being subservient to the older one.
Usually, guinea pigs suffering from such diseases need immediate medical assistance.