Poor guy had to slip onto the astral plane the hard way. To my knowledge you can only use a cat if you have already died before.

Remember when the internet pooped out? and all the blogs, videos, and podcasts disappeared? Jack had to get to the astral planes the hard way? Will this cat disappear too? Also anyone remember when Jack had a tantrum about not being able to talk about how Tom died, and it's not in any of the 4 books on Audible how Thomas got killed by the little grey gremlins?