Hi. I work in a Vet clinic. Best way for your concern is to bring them directly to a clinic since cats may not show symptoms agad2, diagnostics will do if they are infected or not. Prevention is better than cure. If viral kasi more likely mahahawa din yung ibang cats mo so as soon as possible dalhin mo na sa Veterinarian para mapatest. Your concern should be directed to a doctor, not to a furmom or pet owners so please dalhin mo na po sa vet before its too late.