You feed your dog once or twice a day but you cannot limit his water supply. Make sure that his bowl is full with clean, fresh water at all times.  You must remember that dogs are constantly losing water from  urinating and panting. I may be a bit much with my animals but I always give my cats bottled water.  I believe that I wouldn’t want my pets to drink water that I wouldn’t drink myself. Dogs can easily become dehydrated if they don’t have enough water in their bodies. Make sure that you keep that dog water bowl full at all times and clean the water bowl frequently. If your dog spends a lot of time outdoors,  keep a bowl full of fresh water outside with him. Dogs, unlike cats can drink a bowl of water quickly so make sure that you check his water supply frequently. If you go out and leave your dog, it is a good idea to fill  several bowls of fresh water for your friend.