Yes, more than humans. They also have feelings and emotions. All animals do. They also show compassion, empathy, and even jealousy. Dogs can understand over 100 words. Dogs eyebrows have evolved so they can show empathy with humans. You ever notice how dogs somehow know you are going to do something before you are going to do it? How do they know when you are going to go out? How do they know when you are going to go to work. My dogs know when I am just going out to go out or when I am going to go to work. In the first case they go crazy because they want me to take them with me. In the latter case they don't bother me because they know I am going to work. How do they know that? They seem to also have some form of esp. Dogs are God's angels on earth. Even DOG spelled backwards is GOD.
As an aside, a dog will never stab you in the back, will never talk about you behind your back, and will never betray you. That's more than can be said for any human living. Even Jesus was betrayed by humans. Maybe that's why God choose him to be born amongst animals in a barn.