The best way to think of Hunnyboots (or at least V2 or V3) is that they are sneakers, or running shoes you'd wear to an activity such has a fun run, or 'Tough Mudder' event where they may get wet (just like a pair of cross-fit Nikes) but will drain out and dry off. They're made of largely similar material. With regard to freezing conditions, I expect they would behave in the same way as a pair of Nike runners - that is to say they will absorb water and very likely freeze as I'd imagine human runners would. They'd be fine for icy roads and pathways from a traction perspective and for romping in the snow, but they will get wet and so will the greyhounds feet. We recommend you look at our Winter Splish-Splash boots!