It does take a bit to change to warm, so that may have been the issue.

I have hens and eggs stashed several places now, just in case.

For me, though, the cost of the eggs is not nearly as important as the distance to replace them. I'm more than half a world away from the trader (I think), and not using map or portal, so, just getting to and from the trader to get the eggs took many game days of sailing, and probably just as many game days waiting on weather.