Oh, no! I am so sorry to read this. I've been avoiding a horrible story about ducklings in the UK this morning - I can't bring myself to 'see' it but I know it's there. At least your ducklings have succumbed, as far as we know, to a natural event, and not a sickening human one. No consolation, really, but it seems a tiny, tiny bit better to me. Anyway, am sending hugs.