I would not be surprised if at least one of my calipers are dragging.
Strange coincidence. As a favor, I moved drove a friend's car today (non-E9), and not because I was eager to do so. It had been sitting for a few weeks. FWIW, being unfamiliar with this car, I was babying it between intersections and something seemed odd. At the first intersection with the car in neutral and at a very slight decline, it seemed to easily roll forward, requiring use of the brakes. At the next intersection which was on a very slight incline, the car did not roll backward as one might expect. I returned to the driveway and noticed the rotors had a little surface rust from sitting. Following my own advice, I jacked up each wheel and noticed that all of them would rotate in a forward direction with little resistance. However, the two rear wheels offered significant resistance when rotated in the rearward direction. With little time and less inclination to undertake unsolicited repairs, I have no concrete diagnosis. (I strongly suspect that the rear calipers are dragging and/or the car's internal/integrated parking brake shoes are too tight or the friction surfaces are rusted/contaminated. It is also possible, since the resistance appears to only apply in one direction, that somehow the limited slip differential or related bearings are at play. It is not a BMW and has a live axle, so CV joints are not part of the puzzle.)
If there is a point to this story, it is that rolling resistance may not be all that obvious when driving, but may become patently obvious when the driver has to push or pull. Similar to having a can of spinach without a can opener. So, in answer to the question of animal-like behavior, I would suggest a bear. Difficult to rouse when hibernating, but be careful when awake.
How hard is it to push a pig?
Pushing on sand?