She is going to keep them for as long as poss, if they grow to adulthood they will graze in her garden until they fly. Just got to keep our fingers crossed for the little darlings - they are just sooooo lovely. Will try to get pic and post but don't want to frighten them anymore than they have been. We can only assume that Mr Fox has scared mum and dad off (very unusual if he has) or that the nest has floated off in the floods we have been having and they have been separated that way. We are keeping a neighbourhood watch out for some distressed swans.