We have a farm and in the fall there is some weed in the woods that has these impossible little burrs that stick to any woven fabric. They also make a complete mess of my son's Bishon Frese. (His fur is different than my dog's -- she doesn't have the same problem.)

These burrs get so stuck in this little dog's coat that they are almost impossible to remove without hurting the dog. It sure has taken the fun out of my son/family bringing their dog out to the farm. Any ideas? The last time they were here, it took them hours to get the burrs out.