"Doug Kanter" wrote in message
...
....to plant this spring in a spot where disgusting dog owners like to
stop
their filthy beasts on my property. Shrub must be capable of inflicting
enough damage to send the dog to the vet. I'm thinking of barberry. Open
to
suggestions for other shrub options. The planting spot receives sun for
about 2/3 of the day, and will be buried in snow for 3 months out of the
year.

Shame about the snow. I was going to recommend several large variegated
Agave but I don't know if they'll handle snow for 3 months. How about barbed
wire on some bamboo poles?