With the Newf pups we bath on a need to bath basis,which can sometimes be once a week...but, try not to make it that often. We use a nice gentle oatmeal shampoo, Alexanders own, or A1 all systems are nice products. we start them at about 4 weeks of age. It's also a good idea to get the pup used to regular grooming especially when you know it's going to be a big coated dog. Make sure you towel dry nicely, we give the pups a quick blast with the high velocity dryer on low.