If the cat is sitting on a blanket it may be helpful to turn the blanket and draw it carefully to the pen door to enable the cat to be removed as easily as possible.
(the cat; is sitting; on a blanket) (the cat; to be removed as easily; ) (it; to enable; the cat to be removed as easily as possible)
the cat the cat it
is sitting to be removed as easily to enable
on a blanket
the cat to be removed as easily as possible