When I come to a story like the following one, I pray for the day when puppy mills would cease to exist.
When the people from The Humane Society of the United States raided a puppy mill in North Carolina, they were shocked by the filth and neglect the poor dogs were living in. The rescuer Adam Parascandola noticed a long-haired Chihuahua, later named Billy, and he was shocked to see that the cage this poor pup was in was all rusty.
This means that he probably spent his entire life in it. The moment he took Billy out of the rusty cage, Adam decided never to let him experience any pain or discomfort again.