I see golden sebright a in groups 2,3, and 4 the ones with the dark bodies and reddish heads. In the last group it looks like possibly 2 Cochins (feathered legs). The other ones with feathered legs maybe Cochins, but they kind of look like brahmas as well. Better pics will definitely help and it'll be easier to tell when they get a little older. You can look up pictures of those breeds and see what you think. If you can get better pictures be sure to include comb (so we can see the type) and legs help too. Ideally, brahmas would have a pea comb, but it doesn't always happen in hatchery birds, and Cochins will have straight combs.