Please take a look at this picture. My dad and I can not figure out how the beavers we able to chew off the branches on the fallen tree. The only thing we can logically think of is that the we able to balance themselves and climb to the end and chew them off. However the chewing was down from the underside. Do they stand on each other's backs? This was a fresh cut and not done when there was 4 ft of snow on the ground last year. Any ideas?