Consistency is extremely important in all aspects of positive reinforcement training and raising a dog.
When giving rewards and praise, or even just training your Rottie in general consistency can be the biggest factor in getting results and the true success of your training efforts.
Dogs are not people, words are just noise to them. They have no idea that “Good boy”, “Great job” or “Way to go Molly” all mean they did the right thing. Pick your praise phrase for each good behavior, and make sure you (and others in your family) use that exact phrase or word every single time. When teaching commands the same rule applies – stay 100% consistent with the words and phrases you use for each command – this will ensure that your puppy learns fast and the training lasts.
Consistency goes beyond just training, so always be looking for opportunities for you and your family to be more consistent in training and raising your dog. Consistency will help them build the right life-long habits.