I have 26 chicks coming from Mc Murray at the end of the month and I wanted to make sure I have everything I'm going to need before they get here. We are building the brooder, which will be 4'x8'x2' tall. I'm planning to have a removable divider for when they first arrive and then expanding as they grow. I have a three quart waterier, one of the tray feeders, a reptile thermometer, bag of pine shavings, and a small bag of chick grit. I will pick up the starter mash right before they arrive. Is there anything else I need?