First time chicken mom here...I've found plenty of info on younger and older chickens, but can't find much for the age range of my chickens. What should I be feeding them? Currently they are on starter crumbles 20% but since tractor supply has chicks right now it's very hard to find, I picked up a 50lb bag of grower finisher (15 or 16%) but am nervous they are too young! Also, the store was out of chick grit so I had to grab regular, too young for that? What else will they need in the next few weeks/months? Also, I'm giving some garden scraps and they are gobbling them up, but are they too young for scratch and the treats at the store?