Don't worry, it's a reasonable question. There are a lot of variables in shipping eggs and fertility is usually not the reason for failure to hatch. Odds are if you have anything developing at all fertility is NOT the issue. I have had 5 sets of shipped eggs with a zero hatch but development did start in at least some of the eggs sent. The only time I contacted a seller is when nothing developed in the dozen they sent and another person confirmed they had nothing develop in the shipment prior to mine. This was early in the year and the seller, who had not done any test hatching of their own, refunded my money. As I accept the risk of shipping eggs I did not ASK them to do that. Most sellers will try to keep you happy especially if the problem is at least partly on their side.
That's awfull - I feel a little bad for the hungry fox, but enough is enough. Good hunting!
lol.. i received rotten eggs one time.. several had exploded in the box before i opened it.. the seller swore it was the postal service's fault even though I had received it three days after they shipped it and opened it right away
needless to say I never bought eggs from them again