Now, a bear weighs approximately seven hundred and fifty pounds. A large German shepherd weighs about ninety pounds. It should be essentially impossible for a dog to knock over a bear.
However, certain dogs have mastered the science of Rexonomics, which enables one, through the use of specific equations, to change one’s own body mass, not unlike the Vision except without the horrible color scheme. Certain dogs such as Rex the motherfucking Wonder Dog.