I put the rescue kitten straight in with my old cat just to skip the awkward first days: the morning the blood results came back, it was already too late
Introducing a rescue kitten directly to your resident cat might seem harmless, but it’s one of the most dangerous mistakes new adopters make. A kitten can look perfectly healthy while incubating deadly viruses like FeLV or panleukopenia, invisible to blood tests. By the time symptoms appear, it’s often too late.