That pet store has under cover animal control officers in there ALL the time.
They are a horrific pet store and I worked there for years before I knew about puppymills etc.
The owner gets mad when workers even bath or interact with the puppies.

The blackheads and shaking probably has much more to do with the horrific puppy mill these puppies were raised in than the pet store. Although the petstore is partially to blame as well for selling these puppy mill puppies.
They get black heads and acne from not being bathed enough. She was freezing and scared so I imagine that's why she was shaking.