Irritated pad

Well after the last hunt I noticed Willow had a small abrasion on her left rear pad.  We have been treating it and it is getting better and does not appear to be opening up.  I also have been looking at Musher's Secret. I just ordered some and will be treating her paws with it from now on, as long as there are no negative affects from it.  I am hoping to get out in the next week or two, but that will depend on weather.  We have not been above 0 in the past few days.  Actual windchill has been -40 the past few mornings.