@Blah Ok, I tried it again, and this time in a regular world (NOT an amplified one) and the water particles, shaking sounds, and shaking itself showed up for me. You must have Minecraft 1.7.9 (I can only confirm it in that version since I tested it in that version), you must be in creative mode, you must spawn a wolf with a wolf spawn egg, put a lead on it, fly in the air until the wolf comes off of the ground, fly down, with the wolf still attached to the lead, into water, then wait a few seconds and pull the wolf up and away from the water, and then fly down and the wolf should die immediately if wild, and then you should see water particles come off of the wolf carcass, hear shaking sounds, see a bit of shaking until the wolf carcass disappears. Also, you might need Windows 8 as well, because this glitch might only work on Windows 8, I'm not sure...
@Blah Idk what happened with me then. I'll try it again now. Maybe it's only in amplified worlds?
@Blah I'm fully aware that dogs and puppies ARE real. But they aren't really in the game. They're just some mobs that are coded with textures and are also coded/programmed to fight automatically if you just hit something, either with your hand or your sword (but not with your bow for some reason?). Don't get me wrong, Blah, because I love dogs and puppies (including wolves and pups). It's just that...well...these are kinda...fake.
@Blah Ok then, thanks. I knew it happens when dogs are alive, but I wasn't sure if it was intended for dead dogs as well. I guess I'll just leave this here then (since I can't delete it), and try to find more TRUE unnoticed glitches, but there isn't much to find. And if there is---it's gonna be hard to find them.
EDIT: Oh....wait then. So I guess it really isn't a glitch after all anyways (even though I partially knew it was a glitch but then still thinking "Well what if it is...?")? I can't really say how long they should be in the water since I never really count secs while playing Minecraft....maybe 17 secs at max now that u say that all mobs drown within 20/25 secs of being in water. Thanks anyways though.