I keep my horses barefoot year round, however, I do have boarding horses that are shod. I have to keep a hammer and chisel in the stables to get not only the snow balls out but we get these huge ice balls too. There's no other way to get them out than to chip away at them. It is really hard work!
Very dangerous to the horses when they get packed up with snow or ice.
I will try the vaseline and Pam ideas.