Muffin from Bluey is initially introduced as a 3-year-old in the series. Over the course of the show, she has two birthdays depicted, which means she ages to 4 years old during the series. Some fans speculate she could be considered 5 technically, but the most consistent information is that Muffin is 4 years old as of the "Pass the Parcel" episode
. She is Bluey and Bingo's cousin, known for being energetic and sometimes chaotic, still learning how to share and play nicely
