Question..... Is it illegal to sell puppies from a petshop?
Answer..... NO, so long as the petshop concerned has a 'petshop license' and buys the puppies from a licensed breeder - then sadly they are NOT breaking any law!
There will be stipulations ie number of puppies allowed etc...
Check with your local Environmental Health or the Dog Warden if you have any concerns.
Remember every little you do might help save a dog/puppy from suffering.