Hello! Welcome to YT
What kind of food is best for puppies? Here is a website that reviews dogfood. I love this site
Dog Food Analysis - Reviews of kibble What kind of treats are good for the puppy? and for training? For treats, all 3 of my furbabies LOVE "bullysticks" to chew on. For training, I use 100% dehydrated salmon (or other kinds of fish), alot of people use cheerios.
What shampoo is good? I use "Isle of Dogs", but there are many good shampoos, and alot of threads have been posted about this. You could do a search and maybe even order samples from the companies that you think you'd like to try. Minksheen and Chris Christensen are also good
Do you think a puppy litter box is good for the home? We use pee pads, but some people choose to use litter box's. It depends what your personal preference is.