
I had a similar experience with my friend's bitch. They had mated their Lab male to next door's Lab bitch, kept a bitch puppy (to keep with her entire father... doh!). He mated with her on her first season, they thankfully had the injection to stop any pregnancy, but rather than then castrate the father, they then allowed him to mate her on her next season (still under a year old), and the first they knew of her pregnancy was when she started producing puppies. The OH was at the pub, poor bitch had to whelp in her dirty plastic bed lined with a blanket. She had 5 puppies so they went to bed, only to find she'd had a further 2 plus a stillborn by the next morning!
Like you say, I too cried tears for those poor little souls. I gave them BOTB plus another good book on raising puppies. I gave them blankets, vetbed, newspaper, and offered any help they needed. My friend's OH was bragging how much he was going to sell the puppies for, and how he had "beaten" me to it... we were expecting a litter a few weeks after.
They were having an extension built at the time, so the puppies were left in a crate all day whilst the owners went to work full time. I guess the builders must have let them out/fed etc, but when I visited at around 6 weeks, pups were all crammed in a crate, faeces everywhere - absolutley disgusting! When they let them out, they would have to put the bitch in, so she wouldn't get jumped all over.
Thankfully, the bitch was a star, although in the end after all the pups had been virtually given away (he tried to "sell" them but no takers), a friend of a friend offered to give her a home, she had after all, been given no training, was never taken out for a walk, and was just a pain! I've heard she went to a lovely home, lives with another dog, and has the life of riley, I'm so very relieved as she really deserved better!
I did distance myself from them for a couple of years after this (my very good friend of 24 years - I was really upset and disappointed in them) but I do visit now, and always make a fuss of their male (now castrated) who lives a solitary life, rarely gets taken for a walk, such a lovely boy - such a waste!
So I agree with the OP - I do wonder sometimes why people bother having dogs at all??