Kittens – where did the concrete go

No, it's not really a problem. Assuming you're there to re-assign them.

The big problem is if you make sure you can survive a normal winter (-75% catnip rate), leave the game idle for a while (say overnight), and at some point, a cold winter hits (-90% catnip rate). If a kitten dies while you're idling, then the new kitten to arrive won't be assigned a job until you get back.

There are a few achievements related to starving kittens, though. You need to starve kittens for two of them (one at ten dead kittens, one at 100), and another comes for reaching 50 kittens without any dying. You don't need to worry too much about missing that last one, though; it's easier after a reset or two anyway.

Of course, the real question is: are you going to live with yourself after letting a poor innocent kitten starve to death?

As per this quote from the developer:

Only two top skills are displayed, but there can be more of them.

The reasoning for only displaying two was also mentioned in that same thread, higher up:

Census will be too overburden on a higher population otherwise.