<human>: Can you provide a brief rundown of the text in within 3 sentences?

My roommate and his girlfriend recently purchased a Chihuahua/Jack Russel mix off of craigslist in Oregon (specifically in Portland). They were told the puppy was 6 weeks old. Upon getting the puppy back to our apartment I checked him and and found that he had fleas and worms. My first concern is that I was under the impression that you couldn't sell a puppy under 8 weeks of age (I check laws on this but I couldn't find one specific to Oregon, but most other states require at least 8 weeks with a one or two allowing 7 weeks). My other concern is that the puppy had fleas and worms at such a young age, partly because its such a small breed and so young. I'm worried that they got a puppy mill puppy. Unfortunately my roommate and his girlfriend are kind of idiotic so they aren't taking this situation very seriously. The first thing I did was go out and get a flea comb, a flea collar (that is safe for puppies), puppy shampoo and some dewormer. Cleaned him up as good as possible. I'm currently pressing my roommate to find the number to this "dealer" so I can first off call her and based on what she says possibly report her. 

So what I would like to know is if there is anything else I can do to make sure this puppy is ok. My roommate has been stalling on taking the puppy to a vet and is instead buying those self administered inoculations. Is there any signs that would indicate that this puppy is from a puppy mill? 

Besides the fleas and worms the puppy seems to be fine. He eats plenty. Is active (when he isn't sleeping). And seems to be happy. But I'm concerned that other puppies from this dealer may not be getting proper treatment and some of them may be in worse health than the one my roommate got. Any insight or recommendations you guys could give me would be much appreciated. I may be over-reacting to a very common situation but I'd rather be cautious and make sure there isn't some breeder abusing other pups and selling them to unsuspecting people on craigslist.

Thank you for your time.
<bot>: Roommate got a puppy. I'm feel that the breeder may have sold the puppy illegally and the pup might be from a puppy mill. What can I do?