So I dried two water bottles that have large openings, went out to their pen with my reach grabber LOL. I took a chair and sat down at the edge of the area with shavings, within two minutes my black mare walked over and peed and I caught it in her bottle. Got it closed up and the other bottle ready and in a few more minutes the white mare walked over and I caught hers too LOL. I was on the phone with my friend who couldn't believe what just happened LOL. So ran the tests, ended up having to add a drop of water like the test said you could as it was not soaking in after even a few minutes, the black mare showed a quick positive and the white mare showed a negative result. I have a third test that I will keep on hand if I feel I need to rerun the test on the white mare if she has any changes.