Puppy safe shampoo is gentler for puppies, but it also works great on older dogs as well.
Things to consider: Getting soap in his eyes, making bath time easy, and soap alternatives.
No More Tears - Puppy safe dog shampoos are generally tearless, which can be great on any dog whose owner cannot avoid getting soap in her eyes. They also use gentler detergents, which is not only puppy safe but also good for dogs with sensitive skin, like chronic dryness and flakiness. Puppy safe dog shampoos make an excellent alternative to adult dog shampoos for dogs with more sensitive needs.
Early Start - To enjoy a lifetime of easy and pleasant dog bathing experiences, start bathing your dog when she is young (as young as possible). If you're lucky enough to get your dog when she's a puppy, start him right away (the day you first bring her home, even), being sure to use only puppy safe dog shampoos. Then make sure you are consistent in bathing her regularly so that early on she gets used to the bathing experience being a gentle, harmless, and even affectionate part of her natural routine. Hey, she may even start to like it.
Alternatives Available - As an alternative to dog shampoos specifically labeled, "Puppy Safe", check out natural and holistic shampoos as well as herbal therapy shampoos too. Most of them are also tearless. With their gentler ingredients (natural detergents and a lack of fragrances or dyes), they might also be puppy safe.