It's how they fund their monastery. Check out the website:
http://www.newsketemonks.com/dogs_archive.htm
"For over 35 years, New Skete's German Shepherd breeding program has dedicated itself to providing the best possible companion dog for you and your family. The excellence in temperament, personality and structure for which our German Shepherds are known is the result of carefully researched and selected bloodlines and the all-important early handling we give our puppies from the day they are born until they leave us between 8 and 10 weeks of age. All of our German Shepherds live right in our monastery, with each monk responsible for the training and care of a female or male dog. Our books and videos (The Art of Raising a Puppy, How To Be Your Dog's Best Friend and I & Dog, ) provide detailed information that describe and illustrate our distinctive approach."