Adopted a Puppy Mill Survivor (Free Write)

I had kept seeing a dog on petfinder (a website that shows dogs at animal shelters for adoption) but decided that i just couldn't take him at the moment because i was to busy and didn't need another dog. After a few months i looked on the website and saw the the dog "Niko" was still up for adoption which i thought was strange because he was a Japaneses Chin and that's a very rare dog to see at an animal shelter. The info box about him said he was maybe from a puppy mill and he spins in his kennel and runs in circles when he's outside but given the time would bond with some one. So i called the shelter in Polson and set up a meeting for her to bring him to the Kalispel animal shelter. When i saw him he was  so small ( a change from the giant American bulldog i already had) and shaking terribly. She told me he had been adopted to four or five homes already and returned each time. I had worked with terribly shy animals before and figured after some time he would come around, but i was in for a big surprise. I took him and as i guessed he lived under the bed, i had to move my bed every time I took him out potty. Which I had to do so on a leash because he would run away and hide in the back yard if i let him off leash. After Two months and still having to move my bed also never seeing him wag his tail decided to take the frame off my bed so he couldn't hide and I didn't have to move the bed each time to get him. I took him to the vet to get him a check up and had to pay 400 dollars so he could get infected teeth removed then he got into the habit of going to the bathroom on my bed which was new. I have now had him for 7 months and need to buy a new mattress, I have to take off my sheets and blankets every time i leave so i don't have to wash my blankets everyday its also still a struggle just to get the leash on him. After this experience I did research on dogs from puppy mills and realized just how much it messes up putting an animal like that in a small cage with no contact. It has been one of the biggest wake up calls about the way we use dogs as profit and thanks to Niko I am reminded of it everyday.