They won't do well with harsh commands but will walk all over you if you let them. (pethealthnetwork.com)
However, they must be trained gently and without harsh commands or strong physical correction, as they have sensitive temperaments and can be easily damaged if trained too harshly. (en.wikipedia.org)
Roughness in handling, military precision or harsh commands by the handler must also be penalized.» (samthedogtrainer.com)