yes! A silver wyandotte will be new to the flock and the same age as all the others. We have golden laced wyandotte so wasn't sure with the 2 different Wyandottes what would happen especially since GLW is still having being pecked issues.Are you asking if it is OK to combine 2 different color variations of chickens? Absolutely! If you are asking about two different ages, just make sure the youngest is old enough to hold his own and you should be good.