If you are going to start giving baby keets treats right away you can start out with chick grit, it's small like coarse sand and usually granite... some feed stores carry/stock it, but you may have to have them order it for you. Parakeet grit works for young keets too, and you can usually get that at any major pet store that carries bird supplies, you want just plain grit tho, not the type with oyster shell added, the keets don't need the extra calcium at this point. Some people use a handful of small fine gravel/coarse sand from the side of their driveway, which I have done (but I like the actual grit because it's cleaner, lol).Thank you so much for all your answers! I am new to guineas and want to do it right. What is the grit you talked about? Do you get that at a feedstore? How much do you give them? I want to be a hatch a holic also when I get it all figured out!