Been testing my mare, who is now within about 24 hours of foaling.
I have a few different strips as well as a pH meter. I find I get the exact same result with all of them if I just squirt a drop of 2 of milk directly onto the strip, that I do when I do it the “textbook” way which is 1:6 milk to distilled water.
So, why the recommendation to mix it?
PS, I found Tetra 6 in 1 strips at PetSmart that read down to 6.2ph…