I'm thinking mixed breed birds, but better pics would help, esp on the first birds. The first pic looks to be females, some type of red layer and maybe a partridge colored layer, and the last two are mixed breed cockerels.
All of your birds look like mixed breeds. As to what they are mixed with, its difficult to tell. Your red birds (which are females) could have some Rhode Island Red or Welsummer in them. Your other bird is a rooster most likely, and he could have some Hamburg or Dominique in him.