This manual is written for today's pet care profession to help prepare them to understand puppy development and to influence both puppies and their owners through a structured puppy preschool program. Mueller with over 35 years of training experience shares his knowledge in this 200 page manual which includes nearly 100 colored pictures and illustrations. Preventing unwanted behaviors such as destructive chewing, housebreaking issues, and various forms of aggression are only part of Mueller's Guide.