Although Zynga has shown that it’s possible to use Facebook, sheep, and cutting wood to produce casual social gaming juggernauts—such as Cityville, Farmville, and Casteville—it seems that it’s not the grass-is-always-greener that it’s intended to be. Recently, Zynga saw their online population drop around 20% in almost two months; now we’ve also seen the apparently inflated stocks fall by 13%. Kyt Dotson at SiliconANGLE has the story.