#1. Start Young
As early as possible, let your pup stand in a puddle of water. This will help expand their idea of water. Not only do you drink it, but you can also be in it. You can do this with an adopted pup as well. As soon as you establish trust with your new companion, reintroduce him to water. Observe their comfort level in and around the water.
#2. Train in the Bathroom
After a nice long walk, take your canine to the bathroom and instruct him to sit. Reward the action with a treat and walk your dog back out of the bathroom. Repeat this action a few times, instructing your dog to do commands he’s familiar with. Then walk your dog to the bathtub and instruct your dog to jump in. This might take a few tries, but be patient. Once your dog does it or attempts to, reward the action and walk him back out of the bathroom.
#3. Change Your Attitude
Dogs are very sensitive to changes in body language, energy, and mood. If you have a negative attitude when trying to introduce baths, they will immediately fight the activity. After all, why should your dog do something you don’t even want to do?