I found some bloody poop in the litter box a couple of weeks ago. From which cat I have no idea. I didn't panic, just kept an eye on the box. No more bloody poop since then. Could have been a piece of dog-kibble one of them snatched
(that would especially be Spoutnik), ot whatever.
But then, I never panicked over an isolated incident/symptom with the kids either, and myself even less.