@coluber2001,
The picture demonstrates the basis forĀ the principle of anthropomorphism, the assigning of human characteristics to animals and the preference of humans for animals that share human characteristics in appearance or behavior. In other words, we like animals that look like or behave like humans, specifically very young or infantile humans.
Our instincts deem us to like the physical characteristics of the infant so that we become ample caretakers to the young children. Appealing to us is the bulging forehead, the small snout, the receding or weak chin, and the large eyes of the infant child. The opposite of that is demonstrated in the profile of the adult. The unappealing, aggressive, and even repellent features of the adult profile are the sloping forehead, the large snout, the protruding chin, and the relatively small eyes.
Notice the same in the pictures of the young of the dog and cat and even some birds, in this case the pigeon or dove. The shape of the head changes as the animal matures, very similar to the human infant. Even our preferences for the types of birds demonstrates this. On the left is a pigeon with a bulging forehead and a very small snout. The bird on the right, perhaps a crow, has a large snout and an aggressive, sloping forehead. The soft, cooling sounds of a dove or pigeon in sharp contrast to the raucous cawing of the crow only reinforce our preferences for the infant-like doves. We quickly bond with the kitten or the puppy to a great extent because of the shape of their heads. In a few short months the puppy or kitten has grown into a less appealing adult and it's too late for us, we already love them.