YOUNG7,
Of all of Gods' creatures, I'd have to say the Antelope Jackrabbit. I once shot one down thru the back with a .264 WM at about 20 yards. The shot kicked up a lot of dust, and out of it came the rabbit slowly hopping in a quarter circle. I'd thought I'd missed and was going to let it after I checked for injuries. I walked over to it and tapped it with my foot. It just rolled over, quite dead. I checked the spot it had been at when I fired, and ALL the organs and gut were in a nice neat pile. I've also seen them hit with a lot of different cartridges over the years and have come to the conclusion, THANK GOD THEY DON'T EAT MEAT, WE'D ALL BE IN TROUBLE!!!!!!!
I've done a lot of hunting, and serious think all animals can be VERY tough when hit wrong. When hit right with a reasonable bullet from a reasonable cartridge, they just lay down and die. Have you ever noticed that there always has to be one weird reply. This time its mine. Good luck all.