When 14-year-old Walker Cousineau saw a photo of a 6-year-old deaf pit bull mix named Dave, he walked over to his mother, Mindy, sharing: "We have to go to Midland; I have a dog there!" Cousineau started to lose his hearing four years ago, due to a rare genetic disorder called Alport syndrome, which affects the eyes, kidneys and inner ear. When mother-and-son arrived at the Humane Society of Midland County in Illinois, U.S, Dave immediately went up to Walker and they knew they were taking him home. Since then, the dog and teen share a special bond, and Dave senses when Walker needs a little extra love. Any time Walker gets overwhelmed, "Dave will just walk right up to him and it calms Walker down," Mindy told "PEOPLE". Knowing Dave is deaf has supported Walker through his condition. "He's like, 'It's okay to be deaf; my dog's deaf!" Mindy told "The Daily Paws."