No, old gen console can handle a little more..R* wanta us to upgrade to ps4/xbox one..and pc.
I believe they are doing this just to make money. Also, the reason why I believe they will bring the wildlife as DLC to PS3/360 is because I have faith in R*. They listen to their customers, and they put most of what we want in the game in some form or another (such as DLC). What's R* gonna do when Next Gen version releases, Let GTA V die on it? I can see it now (I don't play GTA Online but this is just a guess) the server will be filled with hackers in a few years when they drop support for the old systems, it'll be horrible. But I have faith that they won't do that. I'm sure they'll support the game for a long time and put out a few DLCs here and there for those who can't upgrade.
Can't handle what? A few NPC animal models? Are you kidding me? It's just a few models of some animals, I don't see the problem here. Have you ever thought that those animals seen in the new trailer could very well be DLC bundled up with PS4 version already on the disc? We are just waiting for it to be DLC for PS3/360. I imagine it will come out with, or maybe right before the story DLC. A few NPC animals shouldn't mess the game up. After all, it's just a few Cats, Pugs, and Hammerhead Sharks. No Idea if they plan on adding more than that, but I'm sure they could put in most of it as DLC. Also, Undead Nightmare did the same thing with new animals, it brought new stuff like the Chupacabra among a few other animals. So this shouldn't be a problem at all, especially if the Wildlife comes bundled with the Story DLC.
It's not that easy, you don't know the intricacies which can be at a game as big as GTA V for a hardware as weak as the present on last gen consoles. For your information, having X amount of the same models vs having the same X amount of DIFFERENT models, the last one is always more hardware expensive. That's why you use to see in weak hardware the same cars, animals, etc.
I don't know. I really don't know. We'll just have to wait and see.
EDIT: Well, damn. The poll seems like a lot of people don't want it. A lot of people do want it too but , sh*t. What do you want then? A boring inferior game? You people are never happy with ANYTHING. I swear!