Thanks Alaskan. I haven't used them in the winter yet and not sure if they will be used in the winter but we had some spring snows and I didn't have any snow blow in them, although we didn't have as big of spring snows like we do in the winter where it gets really drifted. I faced the pens to the North towards prevailing wind so where I extended the siding to the ground blocks most of the drifting snow but I was thinking about covering the west side if I decide to use them in the winter cause we do get winds from the Northwest. I did wire them just in case they were used in winter.