Smooch! Dog gives baby sweet reward for first crawl in viral video

In a video that's gone viral with more than 4 million views on YouTube, an infant struggles through her very first crawl across the carpet, as the family's Labrador retriever looks on eagerly.

The smiling girl locks eyes with the dog, and as she nears her furry friend, the pooch can't contain his excitement. It starts with a tail wag, but soon he gives the girl a reward for her crawling accomplishment — in the form of a kiss.

Sweet stuff!

This duo isn't the first baby-doggy team to reach viral-video fame with a good crawl. Back in June, a dog named Buddy decided to help his family's baby girl by simply showing her how it's done.