I have nothing against shelter dogs, my new puppy is a rescue, nor do I have anything against RESPONSIBLE breeders. Responsible being the keyword. Now I now that opinions differ on what that means or if there is even such a thing, but to me a "responsible" breeder would be; breeding to better the lines of the breed whether in longevity of life, health in general, temperment, etc, thoroughly researching all the genetics and pedigrees and selectively choosing when and with who to breed with, having a mentor and a support system in the breed community to help with their breeding program, thoroughly building a relationship with the potential buyers through months, possibly years of communication and having a relationship after the dog is purchased to always have open lines of communication for the remainder of the dogs years with a guarantee the dog is to be returned if the said owner no longer can care for it. That isn't everything I believe in but just a summary of some few important things in my opinion.
The reason why and I will be going to an experienced breeder for my son's dog is pretty simple. I want to know the lineage of my puppy, I want to know that it's been bred to be the best it can be and purposely bred to avoid having "defects" like heart, hip, eye, elbow problems or at least to the best of their ability in that aspect. My puppy will be checked by a board certified cardiologist before being sent home so there is no issues with congenital heart issues. I know what my puppy is being fed, what it's shots records are, what it's been exposed too, what the family it came from is like, if and how he was exposed to children, how it's been socialized and have it specially socialized in certain ways before I acquire it, how healthy it was when it was born, if there was any issues with the litter or mother when they were born, if any sickness has had to be overcome, potty training can be started along with basic commands, socialization to other animals (cats, other dogs, etc) and most importantly the breeders know the personalities of the puppies since birth and can help to decide which is the best for our family and our needs. I will be getting an extra large breed dog and there is many challenges alone with having a large dog, that I need to reduce the health problems and I need that certainty before investing thousands into his dog and training let alone.
With a shelter puppy/dog, you have the unknown which is what I don't want in my son's service dog. You don't know how many vaccines it's been given, you don't know if it's been abused, mistreated, fed cat food all it's life which could cause serious problems, you don't know the parents lineage, you don't know if it has a congenital heart defect and could pass away before 6 months, you don't know what diseases that could have been avoided with proper breeding practices your dog is susceptible, you don't know for sure it's personality in many cases unless you get a great rescue who gets to know their animals but even then it's usually such a short period. There is so many unknowns that I can't take with his service dog that I can't take the chance with a rescued dog. They COULD be great but then again they COULD not be, you just don't know and I would not subject the dogs and my family to a series of cycling through animals till we found the right one, even through fosters, my son with his disabilities would not understand.
Now my Stormy, my rescued pup, is absolutely amazing for a puppy. I wouldn't trade her for anything and there is definitely a place in our home for her for many years hopefully. She COULD possibly have what it takes to be his service dog, but I'm not willing to take the chance of putting in years of specialized training on a "maybe". So she will be a great emotional support for our family, a great companion and part of our family and know the love and spoiling that the rest of our rescued animals receive.
I believe firmly in rescuing when you can but also believe there is a place for responsible breeding as well. If you breed just because they make cute "x-doodle" dogs or "x-weenie" or you think hey, let's give her a litter before spaying her, then there is absolutely NO place in the world of breeding for you.