So sorry about the keets. Did you just get them or are they a little older? Are you sure you have the brooder the right temperature and out of drafts? Keets are a little fragile.
Are they by themselves or with chicks? Keets seem to do okay with chicks that are hatched the same time but can get trampled if there are a couple of days difference. Once the keets are a few days old and up on their feet and getting around good then they can pretty much hold their own against chicks or poults.
Keets are also high strung and freak out so handle them slowly. No fast movements when giving them feed or water.
Without a little more info as to if you just got them or they are older I can't give any additional advise.
Good luck. Hope the rest do okay for you.