Yes you can. There are specific ways to breed within a single group of chickens, called line breeding. half sibling matings are OK until about 4 generations depending on who you talk to. Got some pictures today, I'm trying to get in the habit of watermarking my photos before I share them. Already had someone steal one of my Cream Legbar photos to sell his chicks on RareBreedAuction once. Only had time to photoshop and watermark the Cream Legbars tonight- took me over an hour! Here are some of my favorites.