Echoing the other comment, I don't think you're being unreasonable or unfair.
It could also be worth seeking out relationship counseling/therapy for you and Cheddar. My perception from reading your story is that there could be a lot of communication gaps in your relationship(s). But it's also clear that you're caring and empathetic, so maybe you're only missing some tools and strategies for properly harnessing your empathy.
Nice! And yeah, this is the first year WA mailed out stickers with the ballots