Although I'm not blaming you at all for what happened, kind of agree with Kiera about your lack of communication on the forum. Obviously I don't know when the poor cubs died, but you posted on a Saturday. If they were still alive Sun/Mon and you had no response from RSPCA etc., and vixen hadn't returned, I'm sure if you had posted further info about this, somebody on here would have offered to come & collect the cubs & take them to an appropriate rescue centre. Not me personally as I don't drive, but there are loads of animal lovers on here, that do, who would probably be glad to help if it happens again.