I'm so sorry about your darling cat Charmion. It must have been distressing to say the least, despite her age. And you're right of course, animals can die suddenly from any number of things, strokes, heart attacks and so on. But the poor deer was just over a year old, and very fit.
However nobody will voice their doubts in public about what might have happened, out of respect and pity for the poor lady (Lucy). She may well have a veterinary expert perform a post-mortem to find out the cause.
Our village Facebook is filling up with literally hundreds of expressions of sadness and condolence, from Elsing, Sparham and Fustyweed.
I feel reasonably sure the next thing will be suggestions for a statue, memorial, commemoration or plaque for BamBam.
I can't get out of my head that sweet little song composed by a village lady (she does music sessions for nursery-age children) It was online (Oh deer BamBam) but I'm trying to stop humming it - it brings tears to my eyes.
If you want to listen to it, Google Glow-Worms OHDEERBAMBAM and it will come up. It only lasts a couple of minutes.