My dog smells like fish. What is wrong with her? My parents won’t take her to the vet! : Pets

I have a 14 year old Poodle who smells, to be blunt, like an infected vagina that smells like fish. This has been for months and her butthole and private areas are bright red. You can’t sit next to her because she smells like fish. Her breath smells like garbage. She’s always licking those areas too. I’m 20 and live at home with my parents for now, but they won’t take her to the vet. They’re like “oh it’s cause she’s old” but our dogs sister is also old and doesn’t smell like this. I’m worried she’s uncomfortable in some way. Is there anything I can do to help her that doesn’t require me to take her to vet or does anyone know what could help her?

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