I cut it all down to 1-2 cm but left them two hand size coat over their backs. I needed to cut it down because it looked annoying them all so much. But because we live in North Finland and for example today the temperature has been -12 Celsius degrees I had to leave something on them.
They all are so happy now and jump around satisfied because the thick heavy wool is not on anymore. But to me they all look like silly funny hedgehoogs! ☺
I did brush all the long wool I left and got some wool off to make the coat be thinner. When the sheared parts grow up a bit I can cut off the coat. Or if it gets warmer for a week; meaning around zero temperature.