Congratulations Grammas! It is an amazing thing to see a hen with no prior experience actually know what to do by instinct. Beautiful if you have young children around. Best thing to do is let mamma do her job and keep the chicks seperate from the flock for a while, but let them see each other. We integrated 8 that our dominic hatched of assorted varieties, poppa was a rhode island, she just went broody one day so she got all the fertile eggs. Took two days to hatch all, but she was so proud of herself. We too used a dog kennel, we are fortunate to have a screened porch right off the living room so we could keep an eye on things, but basically let momma do her thing. Food, water (take care the water is not deep enough to allow chicks to drown) and keeping things clean. They grow quickly and no need to do much else. We introduced the young ones slowly, just let them feel each other out, the other girls would go after them, but by 4 weeks they were all free ranging together, which is the best possible scenario if you can do. There is some pecking order, but eventually they get it. They all live happily together now. Lost our chickie daddy to a fox, defending his girls. They will do just fine on their own, just keep an eye on things, make sure all are healthy. Yes, the chick starter is the way to go, momma won't want to lay for a bit, but she'll bounce back once the young ones are "weaned" and will basically ignore them at that point. Good luck, have fun and enjoy them!