Female raccoons, like humans, have an unstoppable drive because all mammals experience a flight or fight instinct when met with a predator except for females with children. They have something called the love hormone, or the bonding hormone. Their brain is capable of rapidly producing a very dangerous chemical drug that is illegal in most countries. This is called oxytocin and is very dangerous for anyone who is not experiencing intense pain. Because of this use as a drug Canada has registered it as a class two or schedule 2 narcotic. That means it’s illegal for anyone to possess oxycodone in Canada without a valid prescription. This means female raccoons with babies will attack you if you threaten their den. If you have a raccoon in your attic during the baby season then it will be an expensive and time-consuming process to get them out. The female is so intent on keeping her den that she will break open a new entryway, usually beside the already sensitive entryway that was just sealed with a one-way door. A one-way door is a humane device that allows animals to vacate from a den under your shed or deck or in your attic. This process allows the animal to leave of its own accord and then locks them out afterwards. It generally takes three to ten days for it to vacate.
If you have a raccoon in your attic or another place on your property then you should call a professional. While no license is required to get wild animals humanely out of an enclosed area it does require experience, training and especially heights training. A two-story roof is very high and the raccoon baby season starts in late winter. Trying to do this yourself is the most dangerous thing you could ever do. Unless you have at-heights training and experience in exclusion you must call a professional. Either way, the process they will go through is to inspect the roof and surrounding areas of the house in search of an entryway the animal used to get inside. This entryway is considered the main entryway, and while they may have made others the one-way door must go onto this access point for the animal to be humanely evicted from the area. Failing to do so will cost a lot of money in attic remediation and general necessary renovations to bring your home back up to code.