depends on how thick it is etc etc. i will normally as it dosent bother me as long as they are warm.
however when we had snow last winter our field was very rutty so with the snow over the top it was a big no no as they could have easily twisted something
Yes of course. Why not?! All mine live out 24/7 all year round. Obviously they have 2 shelters / stables they can go in whenever they want and are rugged up. Mine have been out in almost blizzard conditions with no problems. They seem to love rolling in it. I think it would be a tad different if we got proper proper snow like Canada etc. though! That would likely bury one of my little ones...!
Yes, my boy was out in it all the time in his rug. He even carried on eating grass through several hours of blizzard...even though he could go in if he wanted to!