I've had training for military working dogs, which can include labs, German shepards, hounds, etc. I would agree that trauma-wise, priorities are generally the same for them.
Just to expand, the military greatly values their dogs; as I'm sure that LE agencies do. You never know what could happen. Outside of trauma, the biggest threat to big dogs like this are heat injuries. Still, same priorities. Getting an EJ is even quite easy if you can't find a saphenous vein on the leg.
Not that anyone here would try this, but medication doses are drastically different. The dose for anesthesia in a pup for ketamine is upwards of 10mg/kg. I once assumed that you could go weight -based on the pediatric dose, and we only gave just enough to make fido hallucinate. He spent 20 mins watching an imaginary tennis match.
"I know I'm a fish, but why do I have wheels?"
Gotta love ketamine.