From a CO's point of view, if your property ( including pets ) are endangered or damaged by wildlife, you are free to intimidate them with the most effective method. Legally you got to intimidate first and then if they come back, shoot. ( Just yell at one and when you see more : shoot ) This can be done without a license, and at any given time. Also, in some areas, under some circumstances, it is prohibited by law to feed or bait certain species. So checking the regs or giving a call to your closest Wildlife Protection Office, might make your brother's neighbourgh stop feeding them, thus decreasing the population. Please keep in mind what I wrote is valid for Quebec, no idea if it will apply for ontario. Your mileage may vary.