Who needs kids? New research indicates that dogs and 2-year-old children are on the "same mental plane" and have equivalent developmental abilities, Health Day reports. Most dogs can learn around 165 words and can count to four or five. Also, dogs, like 2-year-olds, do not feel guilt (a trait developed in humans around age 4). Overall, the research indicates that dogs have problem-solving skills that were thought to be limited to primates and humans. Now if only they could make coffee in the morning.