3. German Shepherd
This breed can be difficult to raise because of its enormous size and its enthusiasm for activity. German Shepherds have also been known to attack their owners on occasion if not trained properly. If you are not committed to train this breed, please avoid it. German Shepherds are very intelligent and they know when they are being mistreated and not taken care of. This can make them angry and turn to their owners and attack when they are frustrated. German Shepherds are very delicate when it comes to their health and they may need extra vet care.