RE: Amount of blood?
Deer have around 8 pints of blood or 1 gallon. They must bleed out around 2.5 pints to fall into shock (bleed to death). That is a lot of blood on the ground! When I lay a blood line for my WireHaired Dachshund to track, I lay 10 oz of blood. I can actually lay a trail for a half mile with this.