Just as a matter of interest Nattylou, are any of your Borzoi diggers? I only ask because it's not a trait I would expect in a Sighthound but I knew a few Deerhounds who were diggers. Only one of mine was a digger and fortunately he soon grew out of it. In an hour he excavated a hole large enough for him to stand in.

Merlyn's sire was an English import and most of his siblings were also diggers. It seemed to be a trait in that particular line.