Two Books and a Question

Has any one ever noticed similarities between Guardians of Ga'Hoole by Kathyrn Lasky and Watership Down by Richard Adams?

I have only read the first book in the Ga'Hoole series, so my thoughts are on that.  What are yours?

Mental State of Writers

I'm having a cascade of creativity coming in via insomnia at the moment.  Are writers normal as in mentally sound? I write this philosophically.  If we are not is creativity a 6th sense? Btw, I've read some where we technically have more than 6 senses, science has no names for them yet, so I use that definition more for describing purposes.