To be
on the safe side, you should always leave a bowl of fresh water for
your guinea pig throughout the day. It really depends on the
individual pig but a basic observation of whether your guinea pig
drinks a lot, a little or none will be very useful. That way you
will be able to notice if there is a change in habits.
Guinea pigs need to drink water daily to flush their systems
through and any excess calcium. If calcium is not flushed out of
the body then stones or gravel may occur. It is a mistake to
believe that vegetables or fresh food can provide enough water.
Similarly wet vegetables will not increase the fluid intake enough
and is certainly not large enough to flush calcium deposits out of
the system. If your guinea pig is not drinking enough (particularly
if they have recently suffered from bladder stones) then it can be
given by syringe (oral).