Try, putting a taste in the water and then see if he picks,up his thirst again.

are you asking if your dog won't drink water? . . unless the animal is rabid, or exhibits some illness . . it should drink water . . when it's thirsty . . I'm a firm believer that if an animal cannot handle the most simple requirements to it's existence (eating, drinking, and expelling) . . then it really is a mess and should be euthanized