Babies Often Smile in Their Sleep From the Start If you ... In other words, a 2-week-old's sleepy, ear-to-ear grin is very cute, but it's not an emotional response to parents or other caregivers.

And if some might argue that human babies are more adorable ... and spread a smile on their faces too! If you know other cute little animals, let us know in the comments! We do our best to ...

smiling warmly at the camera, looking cozy in a baby seat wearing a bunny-eared beanie and covered in a blanket. At the end of the seven-photo post, is a picture of Slyvia with her cute little foot ...