raystuttgart
Civ4Col Modder
Goats are only available on the 4Terrains below, but NOT on Tundra.... have tundra hills ...
(e.g. If you check Colopedia of Tundra you will see that there are no Goats.)
Simply check Colopedia in such cases.

(e.g. Terrains.)
Marsh, Wetlland, Taiga, Shrublands
Spoiler :