When you pet a dog which receptors send a sensation from the skin to the dog's brain?

When you pet a dog, sensory receptors in the dog's skin, such as mechanoreceptors, detect the touch and pressure. These receptors convert the physical sensation into electrical signals, which are transmitted via sensory neurons to the dog's spinal cord and then to the brain. The brain processes these signals, leading to the dog's perception of the petting sensation. This response can enhance feelings of comfort and affection in the dog.