They are poisoning pigeons to keep them away from the library. The sick birds need to go to "Hope for Wildlife" for care. There needs to be a more humane method! Dozens of birds died after poison was left on the roof.
Avitrol is currently banned in New York City, San Francisco, the United Kingdom and Red Deer, Alta. Stop using it in Halifax!
http://www.cbc.ca/m/news/canada/nova-scotia/pigeon-poison-used-at-keshen-goodman-library-in-halifax-to-deter-birds-1.3054730