Okay, I'm going to bring up the past, but I was thinking about this today and thought that this forum needs some more excitement.
When I was in college, I worked for a pet supplies store. One day this woman came in who had a 

regnant lab that was too thin. First thing I asked her is... what are you feeding your dog? She was feeding it Pedigree Adult. This was my first sign that she had no business breeding. I explained to her that pregnant dogs need to be on a puppy food (or a good all life stages formula, but puppy food was easier to explain to her). After much hemming and hawing, I finally got her to buy Diamond Puppy - not the greatest, but better than Pedigree puppy.
Here's the worst part: She wouldn't buy any thing over $20.00 a 40lb bag, because her husband lost his job and...
"that's the reason we bred our lab, to make money."
I also told her to take her it to the vet, but once again...
"We don't have money for that."
I let it go, at least content that she was buying a somewhat better food. Then, a few months later she called and spoke to the store owner. Apparently, she was having a hard time selling the puppies and told my boss that I told her that she could sell the puppies there! Of couse my boss knew she was full of it. My boss explained that it's against franchise policy to sell puppies and that we don't want to be held reliable for the puppies if they are sick.
Later in the week I recieved a phone call from her at work. She went on and on about how her and her husband have no money. That they haven't sold a single puppy and that how dare I tell her she can't sell her puppies there when she bought that "fancy" food from us. She was trying to sell the puppies for what Pet Land

was selling labs for.
I eventually just outright told her that quality breeders don't breed for the $, they breed to uphold the breed's standards and that good breeders end up spending more money on genetic testing, food, and vet care than they actually get for the puppy when it's sold. I continued with..."I know you didn't do genetic testing on the stud or your female. You didn't even do research, because if you did you would have known this. That's why no one is buying your puppies, because they can tell you don't know what you're doing." And hung up.
I hope she learned a valuable lesson.