It may be caused by the dog’s fever, as the fever increases the rate of water loss in the dog, which in turn will increase the amount of water drunk, but the dog’s appetite is low, so it does not eat much. Dogs only drink water and do not eat, but also may not be hungry, before eating too much has not been digested. It could also be that the weather is so hot that the dog has no appetite for food. Dogs suffering from viral infections such as canine distemper, which usually causes high fever, obvious infections, etc., will also not eat and only drink water. Further, consider uterine pus accumulation, usually seen in older female dogs, with brown material coming out of the vaginal opening more often than not.
