litter question

[gary]

Title: Message

This is a little off topic.  A month or 2 ago I stumbled over an article that talked about types of cat litter (there were 4) that had 100% kill of FIP virus.  I thought I had bookmaked that but apparently not and my google searches don't bring it up either.  I could have sworn it was by Dr. Dianne Addie but I don't see it on her web site, has anyone seen this article?   Gary