Curiouser and curiouser

Broken feather

This evening I found half a feather at the bottom of their cage.

Whose is it?  How did it break?  Was it the result of a fight?  Was it an accident?  Did it hurt?  Did it break recently or has it been broken some time?

One more thing……. Where is the top part?!

 

 

 

Update: Half-feather found!