If you are visiting a Canadian family, you should follow some basic and important manners so that you don't look unfamiliar with their culture.
Here are some of manners are mentioned in this Android app:
>> Arrange a visit before going to a Canadian’s house. Do not arrive unannounced or bring friends and family with you unless asked them beforehand.
>> It is usually necessary to call ahead if you will be arriving more than 10 minutes late to a small gathering of people, unless you are in Quebec. In French Canada, being ‘fashionably late’ is normal and arriving early to party or gathering can actually be socially embarrassing.
>> Offer to help clean up the meal with your host when everyone has finished eating.
>> Gifts are usually only given on special occasions and are almost always accompanied with a card.
>> People tend to open gifts in front of the giver, either upon receive them or later along with other presents.