<human>: Condense the text into a few key points

Hey reddit, 

This is more of an interpersonal problem-solving issue than anything, but anyway, I share a rental house with 3 other people. Two are a father and son.  We all occasionally hang out/make dinners together, have spent time together on vacation, etc.--so it's not just a business-transaction type roommate arrangement. 

To make a long story short, for months my strictly indoor cat has been getting fleas. When I noticed, I  treated her with Advantage, vacuumed the sh*t out of everything in the house, put down diatomaceous earth (safely!), baking soda, etc etc.  Basically doing everything I can to control it.  I told Housemate that if my cat had fleas, his dog probably did too, but he swore she didn't.

Point is, it has been months, it is winter, and I think that a) Dog obviously has fleas and b) they are living in the carpet or plush things and coming out and feeding on her.  They couldn't survive off my cat because she had taken Advantage.   He refuses to take Dog to the vet and when I tried to take her (we have the same vet and they know me), they wouldn't let me even get her checked for fleas because I need to be on the list of 'owners' for her to get her an appointment.
<bot>: Housemate's dog has fleas, keeps re-infesting my cat, won't do anything about it. Wat do.