Can someone identify this little herb with the sticktight fruits?

http://i17.photobucket.com/albums/b6...cktight1_L.jpg

If my dog runs through a patch for 10 seconds, I have to spend 1/2 hour
combing them out of his coat. :-)

Thanks for your help.
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-Andy S.

http://www.flickr.com/photos/andy_s/sets/