The desirability to choose an indoor or outdoor dispenser is a big factor that must be considered before getting a dog water dispenser.
You must be sure of the kind of pet you have- whether they spend more time outdoors or indoors.
This does not necessarily have to cause any fuss because you can easily buy dog water dispensers like a water fountain or a water gravity feeder for both situations- outdoor and indoor.
But if you want to travel with your dog or want them to participate in certain outdoor activities, it becomes paramount that you get them a dog water bottle, which is another special kind of dog water dispenser.