But moiled is such a direct word--easy to understand and pronounce. I do wonder why this one dropped out of use, at least among the people I know. I don't know that I've ever knowingly read it, but will look out for it from now on.

It gets over a thousand hits on Google, but I suppose many of those will have to do with Irish moiled cattled based on a quick read of hits.

Here's a link that has a photograph and information about the Irish breed also known as Irish polled cattle:

http://www.ansi.okstate.edu/breeds/cattle/irishmoiled/