I have a Whippet who is actually probably some sort of lurcher. She is very, very, very tiny. She is the kind of dog someone who only likes puppies would love. She is over 1 year old now and still looks like a tiny puppy.
I also have a Greyhound. They're both black and white. They look identical bar their size.
I have been asked more than once when I next plan to breed my Grey and if her 'pup' is for sale 
I try to best to politely explain why they rescue if they want a Grey or lurcher.
I was asked if I would 'put' my Whippy some-ones unneutered dog because 'she'd be a great racer. She could turn on a six pence that one'
. I got told I was an idiot for not breeding from her because I could make a fortune with a good racer like that
. I was that pissed off and taken a back by this point 'Stay the fuck away from my dog" was the best I could manage. It then took me three hours to walk her home because I didn't want them to see where we lived so I went to my mums for a coffee and fag but don't tell DH because I told him I kept walking until they dissapeared and I missed bed and bath time aka the nightmare hour for the children
I think, sadly, it is common for people to 'match' their dogs with random pups they meet in the park. It doesn't make it right though and it certainly doesn't make those who vehemently disagree with it wrong.
I'm glad you changed your mind OP. There's nowt wrong with asking a question. Breeding is a very touchy subject on all doggy forums. The bitching wasn't aimed at you. It was more aimed at the other woman and BYBs in general.