It's different for me because I know that computers are
knowable because they were built by people, and lots of people (including me) know how they work. I believe dogs are knowable too because I believe in science, but nobody really knows (yet) how dogs work at anything close to the same level of detail.
Lets take something I know nothing about: Industrial chemistry. That still seems less mysterious to me than dogs, because I know that I could find books about industrial chemistry at whatever level of detail I wanted. But dogs--not so much, beyond a rather superficial level.