You can mix them if you like. Just makes them barnyard specials
I have some mixed birds. We ate the extra male and the female is a good layer. I have some mixed breed eggs under a broody right now that should make good layers for me since I picked my bluest eggs from my best laying EE hens. I should get all sorts of feather colors and should get blue eggs. The father is half silkie and only carries one copy of the blue egg gene. If they come out with his personality, the males should be good boys as well.
Here is the cockerel and his half sister.


I have some mixed birds. We ate the extra male and the female is a good layer. I have some mixed breed eggs under a broody right now that should make good layers for me since I picked my bluest eggs from my best laying EE hens. I should get all sorts of feather colors and should get blue eggs. The father is half silkie and only carries one copy of the blue egg gene. If they come out with his personality, the males should be good boys as well.
Here is the cockerel and his half sister.