I have one.
The good: She is very smart. She is pretty quiet. She is very sure footed; you would think you were riding an Arabian. She has a great jump. She had a naturally balanced trot and canter that required no work from me. She collects very easily. She is affectionate and very interactive…if you are working on something in the pasture or barn she is right there with you. She is a confident mare. She LOVES kids and horse-naive adults. She has great bone, big cannons and roomy knees. She is baroque if you like that sort of thing. Her favorite gait is whoa.
The bad: She will try to throw her weight around to get out of doing something. She is a dominant, alpha mare. I still struggle with getting her to lengthen her gaits. The Canadiens I have met, both at breeders & friends, all want to be up in your face…You have to teach them to stay out of your personal space. She is an easy keeper, I feel like I am starving her for half the year to keep her weight reasonable:( While she grows great horn and has thick sole, she hardly has any bars. So she wears front shoes or she bruises & abscesses. My trimmer has another Canadien with similar feet and it was his suggestion to put her in shoes. Her favorite gait is whoa.
The biggest challenge for me was getting used to reading a drafty breed. She is very subtle when she starts to worry about something unlike that overt reaction of some hotter breeds.
Feel free to PM me if you have more questions. Or I can put you in contact with some people who are deep into the breed so you can find out more about what line he is from. Some lines are known for being feisty.
Do you have his full registered name, it is 3 names. That will tell you where he was bred and the stallion name. And is a great info source.