Mutt Matters is a book with insight and experience from someone who has trained dogs and helped others do so over the last twelve-plus years. All the common problems such as crate training or house breaking, barking, chewing, etc., are covered in the book. Also discussed is an area that many books or trainers do not like to handle, and that is aggression. Having specialized in law enforcement canine training for the last eight years, Aaron Ziegler is more than familiar with how canine aggression comes to surface and how and where it lies within the dogas natural instincts. As a trainer, he uses these natural instincts to mold dogs into partners law enforcement canine handlers can trust. By molding the dogsa prey, defense and fight drives, the dogs learn to apprehend criminals. These same drives are in all dogs, and sometimes the unsuspecting owner does something to either cross that line or unknowingly violates the rules.