Biden Abuses His Dogs?

This is hearsay about hearsay, plus one ambiguous video.

Most likely is that the dog is tripping him up--as especially young dogs often do--and Biden (a) semi-trips and (b) kinda shoves the dog out from under him. Any (big) dog owners out there who haven't had such an experience?* 

OTOH, abuse can make dogs aggressive...and the Biden dogs have apparently bitten about 10 USSS agents... I love GSD mutts--one of my dogs is a GSD-Rottweiler (plus maybe something else) mix/mutt. But purebred GSDs are, if memory serves, pretty high up on the list of dogs that bite humans. 

   Anyway. Judicial Watch is a bit of a loose cannon. I'm no Biden fan, but these accusations are basically completely unproven.

* The dog is big, not the owner.