CS is Colloidal Silver , which you can either buy online or in your local health food store or make it yourself at home with a Colloidal Silver machine/maker.
Trapper has some excellent instructions how to build them, I am technically challenged, so I was very happy when my friend let me have hers.
I gave my dog a lot of CS, probably a liter a day, anything less, I believe, doesn't give you the results you need.(Figured we had nothing to lose....)
Good luck with it, give us an update when you can
Sabine