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Great for testing milk for signs of mastitis. This product is simple to use. Instructions are to discard the first stream of milk then hold the blotter in slanting position so the milk stream will first cover the dark area and then run down over the yellow round area. If the area turns blue, this indicates a positive test. See Manufacturer's label here.
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🇺🇸 Ship from USA · On Agora since 2025
$9.99