Here's a quick guide on how to happily shoot people even if they are not.
*Disclaimer: All of these will basically work depending if you are dumb or not.*

Step 1: Unlock M1917 Telescopic

Step 2: Hide

Step 3: Find a/the target

Step 3a: Eat horse for energy. horses are a good source of protein and target practice.

Step 4: Harass lazy people with One shot, One kill mentality, or people in general, or planes, or horses(eat horse, don't waste meat)

Step 5: If you do get killed by a sniper, remember the spot, Steps 2 and 3 and empty 250 rounds against their lazy 5 round magazine.
Tbag in your place. Then, eat a horse.

Step 6: Steps 2 and 3 and eat horse.

And that is how to happily eat a horse in Battlefield 1.