I wish animals in gta 6 are like in rdr 2 and not as boring and rare as they are in gta 5. Or at least that's how they are in the ps3 version which is the only gta 5 version I ever bought since I might be one person in a thousand who didn't like gta 5 all that much and I actually find it a lot less fun than gta 4 and gta sa...
I'm using rampage trainer. Just go to player>wardrobe>model changer then enable attack controls. Make sure to turn it off before playing as a human again. Right click to focus on an npc then left click to attack, that's how it works for me atleast.