I thought that was a strange breed to find a deer, but after hinking about it, why would you ruin a good bird dog, training it to find deer?
Im not sure if your saying a Rottweiler is a bird dog here? Its not a typical bird dog breed.
A real great breed known for finding downed deer are Jagdterriers. (Pronounced (Yockt Terrier)They are small german hunting dogs that do well with finding game.
But any dog that can scent track can find deer.
Glad deer was found. Too many hunters are too impatient when they make a bad hit and track deer too soon. Pushing deer into thick cover.
Rule of thumb from my experience.
Both Lungs good to go. half hour.
One lung only or no mans land between lungs and spine...good luck deer can run miles and may or may not die depending on blood loss and clotting. The few times ive done this ive tried pushing deer and losing trail as blood trail gets weak and dries up.
Once I tracked one for two miles just dried up.
Heart only - 1 hour (if you knicked it they can live for a while. Ask me how I know.
If you smashed it they will be like a double lung with even more blood.
Liver - 4 hours minimum, I used to wait 2hours, but have pushed a couple big bucks from their beds, still got them, had to shoot them again. Now I find 4 hours better. Smaller deer can probably go earlier.
Guts - 12 hours minimum, same as liver, idea is to let deer bed and die. There wont be shit for a blood trail, and deers first inclination is to bed. So let it do that at the shortest distance from your stand possible, because your going to be doing a grid search in the morning after. Guts and Liver, the old adage, let it die or kiss it goodbye rings true.
Muscle or Ass shot thats bleeding, keep pushing deer to keep wound open. If its a major artery or vein deer will pass out. If not, unlikely youll find/kill deer without a 2nd shot.
Note gun hits can be less blood than archery because there is some cauterize going on. Getting cut with a sharp blade makes it bleed a lot more.