Return of the Mystery Pruner?

We've had a volunteer rose bush that grows in the planter beside the garage.  Cindy periodically cuts it back and tries to dig out the roots, but it persists and eventually reappears, as it did this year.  It wasn't high on the gardening priority list, but this morning I noticed that most of the canes had been raggedly chopped back, most of them about 5 or 6 inches off the ground.  

Just A Couple of Sticks

And One Long One

One cane was still about a foot long, and one small one had been left completely alone.  None of the other plants showed any sign of damage at all.  I thought it might have been a skunk because I had noticed a kind of skunky smell in the area, but Cindy pointed out that the plant about two feet away is called Skunk Plant for a very good reason--that's what it smells like.  When the leaves are disturbed, it smells very much like a skunk has passed by recently.  

So what kind of critter eats rose canes?  And apparently nothing else.  The last time we had a critter "prune" some of our citrus plants, we eventually concluded it must have been a deer.  See http://plantagarden-itllgrowonyou.blogspot.com/2012/01/new-garden-mystery.html  Even though we live in a city of 1.3 million people, surrounded by freeways, deer do sometimes come down the San Diego River, sometime with startling results.   https://plantagarden-itllgrowonyou.blogspot.com/2013/01/yes-deer.html

I'm finding it hard to believe that deer would be such selective eaters that they would prefer a few rose canes to whole garden beds full of tomatoes, green beans, eggplant and other veggie delights.  And although Cindy's anti-varmint panels have been very good protection against the ravages of the California Ground Squirrel population, I don't think they would stand up to a determined deer.

It's still a mystery.