Comment Smarter or not, I choose rats. (Score 2) 154
Having worked in labs with both mice and rats, I'll take a nice Sprague-Dawley any day. They're like little dogs: they hang out, they like to be petted, they're clean and smell nice.
On the other hand, as soon as you lift the lid off the mouse cage, one of those little buggers levitates three feet in the air and rockets off in a random direction, probably sinking their teeth into someone's earlobe. No thanks.