Total chicken noob here! My son has two 6 day old hen chicks (Buff Brahma and Specled Sussex). We have had them for a few days. IN LOVE! He wants to buy two Silkie hen chicks if we can find them. He wants them all to grow up together. I'm hoping to find ones around the same age. Will there be a problem introducing the two new Silkies to the other chicks? If I get Silkie chicks that are a bit older than our existing chicks is that a bad idea to mix them? I think our chicks were hatched on 10/11 and the Silkies I'm interested in were hatched 10/5 or maybe a few days earlier. Thanks! The Silkies are going to break my sons birthday budget and I want to try to anticipate any problems that may occur with introducing two new chicks....don't want it to be an expensive mistake where we have to buy two coops and runs! I'd love to hear what you think experienced chicken lovers.