Here is my fursona in two forms one as a puppy and the other as an Adult

Now if you've see my recent ref sheet of Rhythm as a puppy, you'll notice that when he was a puppy he has two bridge music notes on his left chest a fully colored in heart on his back , and a blue collar with a bridge music note dog tag.
as he got older those marking slowy dissappear or change into what you know Rhythm now as an adult,

his bridge music notes on his left chest dissappear to which he gets the treble clef on his right shoulder and they get his bass clef on the left shoulder later in time to which the heart on his back does the same followed by the black strips that run done his side and wrap around his wrist and his purple collar with the bass and treble clef heart dog tag.

Just a little in sight as how to Rhythm Husky look like as a puppy and how his fur markings change as he grows into an adult.