I know what you mean Helene as I adopted RB BJ Angel, John Hancock, Rocca Baton, Miquelito and Pouncierge from a Breeder who said that they were too nervous and would not make good Pets.
They just needed a place where they would have all the time they neede to relax.
It took a while but they are all great loving Companion Cats as we are sure that Silverado Nugget will be before you know it.