...... you have to realize any bullet can go all the way through more than one critter.
You should only shoot when the situation allows it...
Of course, I would never shoot at an animal with another one directly behind. Not unless you want to possibly wound or kill 2 animals with one shot.
Last Fall I had to wait a minute before shooting a mule deer buck. Tall sagebrush and he was with two does. I could see heads but not all 3 bodies.
Ended up shooting him in the shoulder when I was fairly certain the doe was clear(243 Win/90 grain target bullet, didn't exit).
Several years ago a pronghorn buck caught a 150 Partition/300 WSM, broadside shoulder shot(bullet was a pancake on the off side). Bullet length is key I guess with Partition(or maybe Accubond).