Walking my dog

I love walking my dog. It's my routine to walk my dog twice a day. It takes about one hour a walk. I want to do it more really. But actually I always have a pain in my foot because of my disease. When I told my doctor that I had a dog, he said that I should have had a cat! No way! I like dogs much better than cats. And when I moved here two years ago, my life-long desire to walk a dog had been realized. On top of that, my good health is due to the fact that I walk my dog every day. If I didn't have any pain, I would walk my dog as long as I can and run with my dog.
In the meantime, the expression, my good health is due to ¡Ä, is the sentence that I found in the smart.fm. I can never express that by myself. If I continue to study English, I wonder if I will be able to express myself in that way someday.