It is a burrow.
A porcupine baby is called porcupette
A baby porcupine is called a baby porcupine
porcupettes
Porcupine bristles are called 'quills'. The quills are large and hollow.
porcupettes
porcupettes
Porcupettes
Shilo
Its spikes, called quills ; this defensive adaptation protects the docile porcupine from predators.
a prickle
I would call animal control.
Hedgehog or porcupine