Slow to mature (taking around 4 years) the Korthals Griffon retains a joyous, puppy-like nature for most of their lives. They are sensitive, fun-loving and gentle, and require a sensitive and thoughtful trainer who has patience by the bucket-load. Harsh handling and the use of aversive methods will result in a dog who switches off and will refuse to work! Early socialisation with pets, livestock and people is necessary, along with teaching and maintaining a rock-solid recall, and stop cue. The hunting desire is very strong with this breed and owners must always keep this in mind and be ready to manage their dog carefully.