My comment from the original post for you all here:

It looks like he did a number of drawings of owls! Here are a few.

Perhaps he also appreciated the land-owl/sky-cat similarities like many of us do.

Reading about his background, it sadly seems his fondness for cats was a coping mechanism from living a life of repeated emotional hardship and worsening schizophrenia. Somewhat of a tough read, but I'm glad his pet cats and drawings inspired by them was able to bring him some temporary peace. I know I've relied on the comfort of my animal friends throughout the years, and I know the same is true for many of you.