Approximately at the age of 4 months, you can start feeding once a day, of course, it depends on your puppy. Just remember that they do not get a large amount. These special treats that you add should measure no more than a heaping tablespoonful. Right now, while the puppy is small, use baby shampoo when bathing. I also use the baby shampoo on our older dog's faces because I worry about getting soap in their eyes.
Any shampoo is good however.
Do not use one with a conditioner. This will mean that he or she will have quite a lot of hair growth in the ears. It is important that you make the removal of this hair part of the regular grooming regime. To make this process easier, lay your dog on it's side and start plucking, they're used to it. I recommend doing this every other week.