I am uncertain whether the fourth part of a goat testicle refers to a quarter portion of the whole.
However, when working with this remedy, you are welcome to boil each entire goat testicle, cut up into quarters.
You can boil the four goat testicles in a gallon of milk (that will make 16 cups or servings). However, you could even add more goat testicles. It depends how concentrated you want it.
As for how much you should consume each day, you need to gauge your body and energy levels to see how you respond to the treatment. Give it some time, but in the beginning you can drink a cup of it each day and add from there.
For thirty years I sought God. But when I looked carefully I found that in reality God was the seeker and I the sought. -Bayazid al-Bastami