So, I just embarked using the following profile:
[PROFILE]
[TITLE:AGGRESSIVE EMBARK]
[SKILL:1:MINING:5]
[SKILL:2:MINING:5]
[SKILL:3:WOODCUTTING:2]
[SKILL:3:CARPENTRY:3]
[SKILL:6:SMELT:1]
[SKILL:6:FORGE_WEAPON:1]
[SKILL:6:FORGE_ARMOR:1]
[SKILL:7:HAMMER:2]
[SKILL:7:SHIELD:2]
[SKILL:7:ARMOR:2]
[SKILL:7:MELEE_COMBAT:2]
[SKILL:7:DODGING:2]
[ITEM:2:WEAPON:ITEM_WEAPON_PICK:INORGANIC:COPPER]
[ITEM:1:WEAPON:ITEM_WEAPON_AXE_BATTLE:INORGANIC:COPPER]
[ITEM:1:ANVIL:NONE:INORGANIC:IRON]
[ITEM:20:DRINK:NONE:PLANT_MAT:POD_SWEET:DRINK]
[ITEM:20:DRINK:NONE:PLANT_MAT:GRASS_TAIL_PIG:DRINK]
[ITEM:20:DRINK:NONE:PLANT_MAT:GRASS_WHEAT_CAVE:DRINK]
[ITEM:6:SEEDS:NONE:PLANT_MAT:POD_SWEET:SEED]
[ITEM:6:SEEDS:NONE:PLANT_MAT:BUSH_QUARRY:SEED]
[ITEM:15:MEAT:NONE:CREATURE_MAT:OLM:MUSCLE]
[ITEM:15:FISH:NONE:FISH_CAVE:MALE]
[ITEM:5:PLANT:NONE:PLANT_MAT:MUSHROOM_HELMET_PLUMP:STRUCTURAL]
[ITEM:1:ARMOR:ITEM_ARMOR_BREASTPLATE:INORGANIC:IRON]
[ITEM:1:HELM:ITEM_HELM_HELM:INORGANIC:IRON]
[ITEM:1:SHIELD:ITEM_SHIELD_SHIELD:INORGANIC:IRON]
[ITEM:1:BAR:NONE:INORGANIC:SILVER]
[ITEM:5:BOULDER:NONE:INORGANIC:COAL_BITUMINOUS]
[ITEM:1:BAR:NONE:COAL:COKE]
[PET:2:CAT:FEMALE:STANDARD]
Embark site loads up, and I look at my units list. One-humped camel (the wagon puller, obviously), 2 cats, and... a yak cow? Where'd that come from?