Doug Kanter wrote:

....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.

What about Pyrocantha