There's that old adage that animals are able to just "tell" when someone is a good person. As if animals are innocents capable of determining a secret dark side to the people they meet.
The unicorn lays his head in a virgin's lap because she's pure and sinless.
So what does that say about Jeritza?
There are multiple canon moments where characters learn why Jeritza destroyed Bartels, and they their best to absolve him. Yet, it never works.
He doesnt regret what he did, but if every animal he meets tells him he's a bad person, surely it must be so.
tl;dr a friendly cat would fix him I know it