Will have a word with the other mods about that Milly.
I agree with Roger - Glasgow have proved by rechecking tests that 7% of in house will be wrong, and 5% will show a false negative. I doubt the RSPCA ever follow the up to confirm whether they are in that percentage. And FeLV is worse, as 42% are wrong - any positive FeLV test has to be followed up in 12 weeks, as they can come into contact with the virus and shake it off, which would then leave them with complete immunity. I think if we all had our cats tested, a lot of us would be shocked, especially those of us who have had cats as adults rather than kittens.