Those puppy days go by so quickly that we often look back and wonder how our best friend got so big, so fast!

In “Sophia Grows,” a popular new video on YouTube, photos of a Rhodesian Ridgeback taken in the same spot and while she was standing in the same position chronicle her growth from age 2 months to 3 years, all in just 23 seconds.

And if you find yourself wondering how the photographer kept the pup still for all those pictures, you get a glimpse of Sophia’s adorable antics at the end.