Is she eating more hay than usual? Hay eating typically impacts water drinking, since hay is the rabbit equivalent to saltine crackers essentially! Makes the mouth dry and makes them thirsty.
Is the sound in anyway similar to a human drinking water in an empty stomach? Sort of like gurgling sounds. One of my rabbits has full body sound experiences when she drinks that might just be the result of her posture or when she chooses to drink.
One way to assess if the increase in water consumption is problematic is if you see your rabbit is peeing clear. If it’s clear, it typically means they are drinking more water than they actually need. This can come from boredom or dental problems ( water can act like a lubricant to soothe mouth pain). Do any of these seem to be going on?
Are there any other changes from her aside from drinking?
The answers provided in this discussion are for general guideline purposes only. The information is not intended to diagnose or treat your pet. Seek the advice of your veterinarian or a qualified behaviorist.