I think you should report this seller to the authorities in your area. It's BEYOND obvious what they are doing. You have eyewitness accounts of the cages and how many breeds and litters they have..not to mention the wife and hubby have their own sites.
If your really want to save the pups.. as you stated.. STOP THE BREEDING. The only way to truly save them all.
For evey person who buys one out of sadness and guilt.. another litter is born..and so on and so on.....
And at the price you paid.. why would he stop.
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Rhonda, Bailey, Josie and my angel Bella Rue'
"Until one has loved an animal, a part of one's soul remains unawakened."
~Anatole France~