Day 10: Still no sign

It's officially Day 10, and yet there's still no sign of any silkworm hatching. I'm starting to wonder if these were defective eggs or if there is another problem like refrigerator burn (if that even exists... I know that happens for a lot of embryos kept in freezers, but I'm not sure if that would apply for eggs that were kept in the normal part of the refrigerator over the course of several winter months) that is preventing the eggs from hatching properly.

I'm not liking the signs, anyhow. Some of the eggs have turned a pearly yellow or off-white, signifying that they were either infertile or had not come to term, which is fine. However, the rest of the eggs have turned a mostly grayish or semi-brown color as opposed to their formerly dark coloration. Most of the eggs are now deflated in the centers. I'm assuming that this is proper for silkworm egg development, but it's been a while since I've kept silkworms (the last time was probably two-four years ago), so I can't recall if this is the normal course of action. I've never bought silkworm eggs from a dealer before; we usually either bred our own silkworm eggs, ensuring a trustworthy population from already established cultures and generations, or got some live silkworms that were either in their second to third instar from a friend, so this is new to us.

If the silkworms don't start coming out this week, I will assume that they won't come out at all and are defective eggs. If that's the case, then this will be both the first and last time I'll buy eggs from Coastal Silkworms, and I'll have to contact them to complain and possibly ask for some sort of refund. How utterly disappointing.