Spencer isn't really in much danger from FIP. It is caused by a mutation of the feline enteric corona virus. While the virus is infective, once it mutates into FIP, it is not. 80-90% of cats from shelters and breeders, or any multi cat environment have been exposed to the virus, but only 5% or fewer will actually become ill with FIP. So even if Spencer was exposed to the corona virus by Murphy, chances are that it will not mutate into the FIP form of the virus. And we aren't sure yet that Murphy has FIP. We will continue to hope for the best. Becky