  The ground state of a fermionic condensate is well protected against
perturbations in the presence of an isotropic gap. Regions of gap suppression,
surfaces and vortex cores which host Andreev-bound states, seemingly lift that
strict protection. Here we show that the role of bound states is more subtle:
when a macroscopic object moves in superfluid $^3$He at velocities exceeding
the Landau critical velocity, little to no bulk pair breaking takes place,
while the damping observed originates from the bound states covering the moving
object. We identify two separate timescales that govern the bound state
dynamics, one of them much longer than theoretically anticipated, and show that
the bound states do not interact with bulk excitations.
