Need shade plant ideas to deal with neighbors dog kennel run off.

I am helping a friend design her yard into a secret garden for her.  It is an small urban lot in Northern New England, zone 5, 40" annual rain fall, partial to full shade.
The next door neighbor has 3 dogs that have fenced in kennels along the property line which is slightly up hill of my friend's yard.  Along the property line is a strong smell of dog urine.  
In the center of the yard is what I suspect is a maple tree.    They haven't owned the house long enough to see it leafed out to identify it but it is a large shade tree.



You can see the neighbors dog kennels in the right of this photo. I am looking for a shade tolerant plant that could be planted along the fence to help deal with the dogs urine smell.