Hi Barb; The colloidal silver I use is from Silver wings co., (800-952-4787), 500ppm strength.. Depending on what's wrong, I give 1-4cc/day/fert. If they don't lick straight from the dropper, I put some (maby 5-10%) clover honey in a small btl of the cs., & they most all like it that way. It's the only thing I found to shrink spleens in 2-3 weeks. It's also in Timmy's recipe, see his web site in my sig. for details. It's been recently updated too:) Take care, Gary & the gang of fur Timmy's web site=<http://www.concentric.net/~Gferret/>; He's the ferret totally healed from "terminal lymphoma" without drugs.:) AOL instant messenger name= garyferret :)/ ICQ#4461104 [Posted in FML issue 2285]