Try milk ;)
You should consult your vet and see if your pup needs to be seen since it often means they may need a vet. You also wouldn't want your dog to die of dehydration or have your pup become very ill from dehydration on it's own which happens quickly and within a couple of days on top of whatever may be causing your pup to not want to drink water normally.
Don't give your dog human milk or anything. It usually makes them sick and upsets their stomach at a minimum which could cause your pup to dehydrate even more quickly. They are usually lactose intolerant and do not have the enzymes needed to digest the milk we would drink without it causing problems for them. Having your dog drink milk could cause your pup to become ill even without a prior indicator.
Don't give your dog human milk or anything. It usually makes them sick and upsets their stomach at a minimum which could cause your pup to dehydrate even more quickly. They are usually lactose intolerant and do not have the enzymes needed to digest the milk we would drink without it causing problems for them. Having your dog drink milk could cause your pup to become ill even without a prior indicator.