Hi there!
Whenever our italian Greyhound has the gurgles (that’s what we have nicknamed it) we give a dose of probiotic and watch to make sure she is still drinking. I don’t like for them to not drink for more than half a day or so. Check her gums to make sure they aren’t really pale (if they are call your vet). I don’t worry too much unless they quit drinking. Usually they have just gotten into something that has to work through they’re system.