It appears that the City of Calgary, Alberta has a penchant for poison when it comes to ground squirrel control. I read an article yesterday that outlined how the city is using Rozol to help control the GS population in an "off-leash" dog park. I feel sorry for the dog and owner of any dog that has to go through the recovery process and expense if their beloved pet ingests the Rozol or any portion of a deceased ground squirrel. The Rodenator and its process would be a better choice for this particular application or any similar situation where poison has the chance to be ingested, absorbed or disapated into the atmosphere.