<g> Surely fly masks–even chewed up in pieces–would come through in the manure?? I only found one of the paint’s masks–he nearly put me in the poor-house, as many as he lost (I only found 1). The yearling’s mask I found at least 4 times in the pasture, and once in the woods (she’d crawled through the fence, taken it off there, and crawled back in! Our neighbor has seen her do the fence-crawl!) The last time, she had to have done the same, but gone further into the woods… Still haven’t found it. She doesn’t suffer much from flies, though–she remembered how, as a baby, she simply spent the summer with her head between her mother’s hind legs. Poor mummy.