My dog haves an ear infection his ear stinks what should i do???.?

go to the vet and get antibiotic ear drops. you dog may also need antibiotics to take because the infection can drain into their mouth. that's what happened to my dog only i didn't notice it until his breath smelled really bad so i had to get his teeth cleaned and got two puppy teeth that never fell out removed. my dog was already 4 when that happened. i thought his puppy teeth had already fell out but those two were lodged in there