Kourtney Kardashian and Travis Barker’s son Rocky made a rare appearance on his dad’s Instagram, and fans were quick to notice how much the little one has already grown!

On September 2, Barker posted a series of photos documenting his time on tour with Blink-182, but it was the final image that had everyone talking. The post, captioned “Feed the soul,” included a snapshot of Kardashian and their son Rocky during a zoo visit.

In the heartwarming photo, Kardashian is seen wearing a chic leopard-print fur coat, while Rocky, bundled up in a brown sweater, gazes at the animals. What caught fans’ attention, though, was Rocky’s full head of hair – a big change for the toddler, who is just shy of a year old! Commenters couldn’t help but gush over how much he’s grown, with some playfully expressing their disbelief, asking, “Wasn’t he just born?”

Despite keeping their youngest mostly out of the public eye, Kardashian and Barker’s fans were thrilled to see the little one out enjoying a day with his mom. The adorable moment showed just how quickly Rocky is growing up.

Kardashian and Barker’s blended family includes seven children. Barker shares Alabama, 18, and Landon, 20, along with stepdaughter Atiana, 25, from his previous marriage to Shanna Moakler. Kardashian, on the other hand, shares sons Mason, 14, and Reign, 9, along with daughter Penelope, 12, with her ex Scott Disick. The couple welcomed Rocky, their first child together, less than a year ago, making this rare glimpse all the more special for fans.