Wow guys! When I started this thread I never expected this type of reaction. My question / potential problem is relatively simple - first here's what I know:
It needs experience, what light means when you lift the hive. But if you have that much frost -16C, you cannot do nothing to bees.
If you feed, they may do the feces inside the hive.
So you should wait for cleansing flight. It is not far away. My cleansing flights start here a month later. Bright sun and +5C on snow.
Now my hives are frozen into snow, and I cannot lift them. But I lift the inner cover and it is easy to see, if they have capped food in upper parts of frames.
As long as I see capped food, I move feeding later.
In 2 box hives I may loose and lift the upper box and copare it to empty framed box.