Hmmm. where did you find a large group of these to grind on? I found a post that said lower right of map, around 22/15, but the post made it sound like not a large population.
If you mean the Lost Ewe, Lower La Nocsea toward the lighthouse on the left there is a field usually full of the Lost Ewe, Lost Lamb and Lost Wether, but also look out for the Goobue (SP?). Last time I was there, there was two of them roaming around.
Remember: Some Times the Dragon Wins.