They did NOT work. The goat had a sensitive udder and was behaving inappropriately, so I tested her milk. A bright yellow circle indicates no infection. When I took her to the vet, he quickly realized she had mastitis and treated her accordingly. I'm so thankful we caught him early and saved my award winning dairy goat, but not because of those useless tests. DO NOT buy them. I will try the California mastitis test next time. I've never used them, but they certainly haven't done me any good.
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