In one of her posts in that thread, Glen did refer to an eBay sale item with the words "COWS HEADS" written on it. But the eBay listing is long gone.
I do not think the "Bulls Head" image, shown, and discussed in that thread is the same mark as on the toothpick here. This latter one is much more ... well ... basic, with simple, owl-like eyes! Might still be from the same area though, just a less tidy mark?