Hi! Can I use Kaytee Forti-Diet Pro Health Hi-Cal Grit Supplement for Small Birds for 1 week old chicks? I wanted to try feeding them snacks (eggs, yogurt, fruit, veggies, grass, bugs etc.). I keep finding mixed coments on if it's to early or if it's ok to start it. When they are about 4-5 weeks old I want to put them in their tractor full time and wasn't sure if I should just wait till they scratch the grass and get there own grit before giving them snacks. Once they are in the tractor will I need to always give them grit? They are eating started crumbles now then I was going to go to grower feed at 5 weeks then layer food after that. Any help is appreciated. Also I just bought apple cider vinegar (Braggs) and I was wondering when Can I start giving it to them. They a 1 week old.