My character just added another couple sets of loop snares to existing trail (no fences, just few traps in gaps of trees. Then next spot some few hundred meter away)
Set an inferior loop snare facing pine mire in corner of spruce mire. Baited it with some spoiled crow berries, it is late Pearl month after all. Set 2 more loop snares, look for a spot that I can see all 3 snares from. So when checking them, I can just zoom in, glance, zoom out. And hazel grouse flies over me, turns back to face the 1st of the snares and gets ensnared, then freaks out and tries to flee. Well, that saved a bunch of spoiled berries.
Only time I’ve seen trap not trigger/capture an animal is when hare runs on a pit trap, eats the turnip, then runs off.
Game logic directs the animals away from suitable traps, if there’s better suited alternatives.
E.g. when I make trap fence with pit traps, I also add light lever traps or loop snares every 20-40 meters*; double baited with turnips (for hares) and berries (for birds). Then the pit trap turnips won’t get eaten by hares.
Edit:
*not on the fence line, but in close vicinity, usually in natural choke points. And only on one side, so checking the line in winter, don’t need to take skis off.