Oabee, you're my brother from another mother. I've looked at too many animal minis that only resemble the purported species by having the same number of legs, same number of heads, etc... I saw the Brigade moose recommended on another forum recently and stared slack-jawed at them for a minute. I suppose they could pass for moose if you assume they're doing their usual thing of wading through marshes or ponds.
I've sometimes thought of sculpting some halfways accurate animal minis, but didn't know if there was enough demand to make a go of it. (It seems the big four in wargaming are horses, elephants, and fantasy wolves and boars.) This topic and all the linked examples are starting to make me think otherwise, and you bring up a point about old west gaming. There've been a couple of times I've weighed up my options for sticking grizzlies in games of Gutshot...