Could Bartholomew Kuma's Devil Fruit work inside Doflamingo's Birdcage?
Since there are no facts that supports any of the 2 scenarios, I will say that the Bridcage strings would tear the bubble apart since a bunch of DF-users tried unsucessfully to stop the cage strings from moving.
Following &quot;one piece logic&quot; I am inclined to say that Kuma's paw-bubble isn't invincible (since it is made out of &quot;air-like&quot; shield) as it would one of the best DF there is if the user can make objects invulnerable. Therefore I say that the Kuma's bubble wouldn't pass through Doflamingo's Birdcage