When we were kids, the neighborhood trucking company has a German Shepard guard dog that was about mean as snot. We worked there cleaning stuff in summer time (buddies dad was maintenance guy for the trucking company.)
We painted a few rigs and the like well part of the duties was dog duty scooping & feeding. That thing would tear open full cans of dog food it was tied to a truck tire & rim & would pull it around the shop pretty easy. For some reason it loved to eat brooms, if they were not hung up 8' or better off the floor it was ate at night when the dog had free reign inside the rig bays. I remember the one straw brooms that all that was left was a pile of tooth picks and maybe a 10 or 12" stub of a handle chewed down to 1/2 it's dia.
It particularly like use 3 kids as it rejoiced in grabbing one of our legs & having its way with us. :/ I think I'm still emotionally scared a bit lol.
One sat morning we opened up and found one of the truck drivers holding onto a beam 15' in the air. he got in late from a run and was parking the rig inside when the dog cornered him all he could do is climb the steel beam to get away.
Mark