Communication between cat and mothership intercepted and unencrypted.
Transcript as follows:

BED GREEBLINGS:  The most perplexing type of greebling encountered by
cats is the "Bed Greebling". These attach themselves to humans in their
beds, but for some inexplicable reason the Bed Greebling always expires
(possibly the habitiat in the bed is inimical to greeblings). It does
this with a squeaking or groaning sound (some may expire silently) and
immediately explodes, releasing foul-smelling gases. These gases are
highly toxic and any cat snuggled under the covers will immediately
bail out of the contaminated area. Even humans, with their inability to
detect greeblings, will generally fluff the covers to dissipate the
noxious greebling emissions.

End of intercepted message.