A few people have tried to make hoofs for ice and grass
Think I've come up with the cheapest and easiest DIY version
THE SCREWIE
Only one drawback be very carefull if you make some they are leathal if you step on someones toe (worst than running spikes)
So I present this solution with a warning DON'T BLAME ME IF YOU GET ARRESTED
They are for use on private ground under safe circumstances (Not in Public)
The screws are 1" (8s or 10s will do)
Jason