Bloom-
Not to spread rumours about upcoming versions, but I believe that I heard HT and Pyro discussing the sheep infantry model over channel one. Appearently, it is easier to simply use the sheep art for ground troop models, so they will serve as infantry in the future. If you look closely at the pictures, you'll see that they are carrying carbines, and are calling for your surrender.
I'm not completely certain, but I also note that two of the sheep in the second photo have top-mounted .50 cals.
-Heckel
THUNDERBIRDS
"Where The Men Are Men, and The Foxes Are Some Sort of Dog, or Wolf, or Chihuahua."