i am sorry but this is not true.
In my case the event was 10 days. After 5 days the food item would not drop. So i used gold to speed the fars a couple of times, no succes either.
At the same time my quest items changed from yellow dragon to red dragon. But the quest worked.
At the end yes requirements changed. But with no drops that was useless.
I did NOT get the 2 metal dragons... support team is to busy to resond so im waiting til they get past al the other complaint tickets ....