My five pullets (about 7 months old) eat mostly crumbles, but I sometimes give them table scraps. Sometimes when I am outside I will allow them outside of their run to eat bugs, grass, etc. Do they need grit for that stuff? With just crumbles I wouldn't think so, but do the few bugs, grass, and table scraps make them need grit? I'll be heading over to TSC (Tractor Supply Co.) Within the next hour or so, and need to know if I need to buy any.