Condolences on losing Loki to such a freak accident. Accidents can be esp. difficult to deal with (as opposed to terminal illness) - I think that the guilt factor is greater. But I have never heard of a bird choking on a cuttlebone; I guess it's true that sometimes things just happen, but when they do, the shock has a terrible impact. I hope that you find comfort in the headbutts and purrs of your other babies - they know that Meowwmy's very, very upset.
Susan