If you don't already, please get a strap to secure her to the truck. Our lab was pitched out the back window of our Suburban during a hard stop. We were lucky as she was only scraped up a little. The window was not down fully again until we got a tether between her and the seat belt.
When I was kid our family dog (a medium small Cocker Spaniel mutt) launched out the passenger window of our 1960 rambler Rebel Wagon off my mom’s lap going after a jackrabbit. The good news was we were on a dirt road under 10 MPH.
Same dog was pitched out of the passenger window of my dad's 67 international 3/4 ton when I did a slow flip on another dirt road. I was about 16 at the time. he was probably knocked cold/stunned and I didn't even realize he was MIA til he came limping back some minutes later.
The flip happen during a slight "over recovery" of a slide (caused by smooth gravely road and wide smooth rear highway tires on the back for the camper we sometimes carried)
We found later the right akerman arm on the steering knuckle had simply snapped at that inopportune moment and that tire went sideways and dragged into the berm and I was 90 degrees instantly and flipped like a drunk getting his feet kicked out from under him... onto the driver’s side, then onto the top and settled there... I was left hanging by my seat belt. All at 20 MPH or less.