It's not really a bug, more like poor programming. They really tried to emphasize stealth but they didn't really do a great job at it, compared to other games of that nature. It's still a great game, and there are ways to get around it. It does get annoying though when you shoot a crate with an animal in it with a silenced sniper and they all automatically know exactly what bush you're in half a mile away from the outpost.
I think you're doing stealth wrong. They definitely never find me after I shoot animal cages.
Also I have no problem hiding bodies either. If the body ever gets in an enemy's line of sight they'll find it, so just hide it out of the way of any enemy patrols behind a bush or something and they'll never see it. If they still notice then just hide them farther away- draw them out into the woods with rocks and kill them behind some trees.
Well I can tell you I'm definitely not doing stealth wrong. The game just isn't made as stealth friendly as everyone who blindly defends it believes it to be. This game's stealth mechanic is definitely one of it's biggest weak points.
I did some testing. I tried to shoot the animal cage without being detected. It's impossible. No mater if I am hiding, and I shoot with a silenced weapon, they ALWAYS get alerted and go DIRECTLY to where I am. I am thinking this is related to me playing on the highest difficulty, or bad programming as previously mentioned.
where are you shooting the cages from? If its from right next to / near a guy then yeah they probably heard the shot even over the suppressor. If its from up on a hill with a silenced sniper rifle then yeah thats a bug.
HK-47: Can I break his neck now master? It's been a long time fantasy of mine. You: Maybe later.. HK-47: Did you hear that meatbag? "I'LL BE BACK!"