There are a few options for puppy flea shampoo for dogs over 6 weeks. (wileypup.com)
Apart from the dog flea shampoos with oatmeal content, oatmeal itself in its finely grounded form can be mixed with warm water for cleaning your dog's skin every now and then. (breedingbusiness.com)
But what is the best flea shampoo for cats? (geekwrapped.com)