Manni has never liked the winter road salt, but this winter in Toronto seems to be especially bad. We've tried putting this thick petroleum jelly on his paws, which helps a little, but not that great. Does anyone have any good solutions for this? I've seen small dogs wearing little socks/booties, but never a big dog. What would you recommend for a rather large (90+ lbs) lab? Are some brands/types of the little dog socks better than others?