I understand...I too wanted to allow my girl to have a litter of puppies because she is so awesome, so sweet, so calm and such a great representative of her breed, but...but, these things are not always possible or desirable. So, hear me out because hearing and understanding both sides of an issue is the obtaining of "constructive advice."
Some of us have received our dogs through what are called "Back-Yard-Breeders" which means they were not dogs that were assessed for genetic or temperment issues. So, there is a feeling that just wanting to breed your boy isn't a sufficient reason to allow him to breed. And the Forum doesn't act as a Tinder service for dogs and their owners. It's possible that your dog comes from a great line, one that people want to breed back to to enhance their own lines, and if so, you would have had a huge amount of work done to arrive at the door of offering your dog for stud. You would have had full medicals done on him and a full background done on his sire and his line and his dam and her line. You'd be able to offer guarantees regarding the pups he would sire. I don't know all the particulars, but, the expense of preparing your dog for the possibility of stud service is prohibitive. So, only breeders take the time, spend the money and the outlay of training and housing and medical care that a breeding dog needs.
The pounds and rescues are full of dogs that resulted from good intentioned couplings, people who wanted to let their girls have one litter, and people who just wanted to get their male dogs a date, people who are proud of their dogs and want to see their qualities carried on and not lost. There are no end to the reasons why people want to breed their dogs, including the worst one...making money off them.
Many members have dogs that were bred by Back-Yard-Breeders, and their dogs may be healthy or they may have many crippling and very, very expensive medical conditions and those dogs suffer. It's something to think about. Not knowing the genetics of the dogs involved or their temperments, not knowing their lineage, it makes it a bit of a crap shoot. And it's easier for the "stud", he isn't going to be hampered by the expense and 24 hour care of a litter that can range up to 15 pups...even more. I suspect that since you don't know the usual route, and what is required, that you don't have a champion with great bloodlines that could demand large stud fees.
It's possible that someone from here might make inquiries about your boy, but most won't, nor will they facilitate Back-Yard-Breeders or people who run puppy mills. There are just too many Mastiffs in rescues and dog pounds that are waiting for homes or in some cases being put down because no one wants them.
