Grape juice is drunk by many around the world in various forms and flavours. It is normally found in cartons and sold by grocery stores.

image wikipedia

So if we can drink it, can guinea pigs drink grape juice, and if they can how much of it can they drink?

Unfortunately they can’t at all.

This is because it contains too many additives and preservatives for guinea pigs to handle.
It is also very acidic and will hurt their tummies if they drink it. So it is worth keeping away from guinea pigs.

Instead, give them tap water instead. They will enjoy it more and keep the grape juice to yourselves.