Our four red red sex links are two weeks d already. I can't believe how quickly they are growing and changing. So many feathers coming through- you can almost see them growing. They are just gorgeous and as a chicken newbie, I am besotted!
Mine are outside, so their grit comes from the dirt, litter, and pea gravel (bottom scrapings, fine pieces). You can get chick grit but I would wait until three weeks before offering grit and treats in the brooder.
Comes in fast when they do. I would check on mine multiple times a day and they would change each time I looked at them. There was only a couple I could name early On. The rest are getting names now since I can start telling them apart. There is one that I have named Sriracha. She is the fiesty one and wants things her way. Name fits her well. She is the most pretty feathered one. I will take a pic of her.