Adorable, I love the rock too! Ideas, thicken the tail and add ear holes. This pic I found on google images has good examples of both those things. :-)
Seramas come in every color. I raise Exchequers. I also love frizzle Seramas.
D´Uccles come in many varities but I love Porcelain, Mille fleur, Silver Mille Fleur, Mottled, Lemon Mille Fleur, and Gold Neck.