Den. unicum - just arrived - leaves yellowing/spots

[Stevie_White]

I just got my new unicum in, and in about 36 hours I had to take the two leaves pictured off due to their going from a normal appearance to this.

They are developing brown spots surrounded by green as the rest of the leaf yellows. Is this a pest (mites)? I see no bugs on them, and the two canes are still growing.

Is it possible that this is cold damage? I live in Northern Idaho, but we haven't had any temperatures below freezing while these were in transport.

All assistance is appreciated!