You are doing well, it takes time. I only had flukes in the 1st 2 flushes so in a way I can't relate to all your problems.
I have done a lot of reading over the last 5 years and some people get breakthroughs sometimes after 10 or 20 flushes (I put flukes in the search box). It is difficult to be patient, we all like to fix ourselves quickly. So please try to be positive.
You certainly don't have to get rid off your dogs. Zillions of people live with animals, you might like these links, dogs get parasites from humans :)
This is an inexpensive tasteless parasite cleanser for animals and humans. I have never used it but sent it to a lady whose husband was in Kuwait and thought she had to give up her dog because she read Clark's book. She later sent me a picture, it was the cutest little cocker spaniel.