why does he get one more marking?

I found a new marking(like a half ring, black colour) above his nose for a week.  Like a half ring.  When I touch it, I found no special.  Just like the hair colour makes this half ring.  Why?  What is it??  

Is it related to change fur recently??  thanks.

hair color change of young rabbits is normal
It is funny :073:

just the black colour half ring above the nose.  like the colour of fur.  What is it?

是兔兔換毛!!
呢個情況係非常正常
我的兔兔都係一樣!!!

換毛je~唔駛擔心~~
兔兔每三四個月又換毛~久唔久就會有唔同既圖案架喇~
不過額頭位都幾耐先生返靚d毛毛~
睇黎呢個標誌會last 2-3個月架~

thanks a lot.  I can sleep well tonight.

好型丫~好似框框咁框住個鼻 kawaii