Rabbits continue to follow the player even once they are in breeding mode

Okay so I tested it again, and the rabbits indeed are NOT teleporting. It seemed to me that they were because they were escaping from the fence pane I built. But they are scaring because they can jump higher than 1.5 blocks (which I'm guessing is an intended behaviour?).

So yeah, sorry about the wrong report, they do not teleport. Raising the fences another block high guarantees that the rabbits stay in.

The other problem is still valid though. They don't breed if there's anyone around holding a carrot.
If I were to guess what the problem is AI priority. The AI that determines if the rabbit should follow a player has higher priority than the one that says it should mate.

Rabbits cannot escape standard fences.

After looking at the code I believe my initial guess was indeed correct.

Code extract from the pig class:
this.i.a(3, new ys(this, 1.0D)):
this.i.a(4, new aaf(this, 1.2D, amh.bY, false)):
this.i.a(4, new aaf(this, 1.2D, amh.bR, false)):

Code extract from the rabbit class:
this.i.a(2, new aaf(this, 1.0D, amh.bR, false));
this.i.a(3, new ys(this, 0.8D)):

"aaf" is the AI that determines that the entity should follow a player holding an specific item (Carrot on a stick and carrots for pigs, and just carrot for rabbits).
"ys" is the AI that makes the entity mate.

As you can see, the mating AI has a smaller priority (smaller means it gets executed first) than the follow AI on the pig,
But, on the rabbit, the follow AI has a smaller priority than the mating AI. Therefore the rabbit will attempt to follow before mating.

Jonathan Hynes, they do escape if you have carpets on top of them. Other entities don't.
But that's probably because rabbits naturally jump around whereas pigs and cows don't unless they feel like they have to. So yeah, probably not a bug 🙂

If carpets allow for escape, the rabbit jump height might just be oversight then. It seems intentional that fences are high enough; maybe they forgot about carpet height.

Edit: oh, do you mean carpets on top of the fences?

yup, I placed carpets on top of the fences so that I could jump in and out but the animals would stay in.
This seemed to have allowed rabbits to also jump out, but other animals remain trapped. But like I said before, this probably isn't a bug, just a consequence of a hopping personality of the rabbits 😛

Oh duh that makes a lot of sense. I'm not one to utilize MC physics quirks on a regular basis.

It may have been a fluke, but in the recent snapshots, if you place carpet on fences like many do to allow player access but not animal, animals seem to be able to jump the fence with the carpet as well.

I found this out the hard way after penning a bunch of sheep in with fences and carpets on top. I found them all over the place a few minutes later and saw them climbing on to the carpet just like players can. I stopped that practice right after that.

I now place all my animals, including rabbits, in 2 deep pits with a single ladder on the upper block. They don't escape due to chunk loading are just as easy to access as the carpet on fence trick.

I may need to revisit this to see if this behavior has changed again, but it was a real sore spot with me earlier.

I can confirm in 1.8-pre1 release, when breeding rabbits, they stay in "captive" mode after feeding them carrots, until the player switched the item in hand. This does not seem intended, as pigs will breed even while the player is still holding carrots.

Also David, I can confirm that rabbits, as well as other mobs, (less frequently though) are able to jump over fences with carpets on them in the 1.8-pre1 release. Do you know if there is a separate bug report for that yet? I would like to up vote it.

Edit: Added snapshot version.

It's hard to say if this has been reported since I wouldn't have called carpets on fences something that would hold passive mobs in. Since a player can jump onto such a fence, I would expect a mob to be able to as well. The fact that they were not able to in earlier releases doesn't make this a feature that would be considered a bug if that behavior changed later.

I just checked the 1.8-pre snapshot and put carpet on top of a fence pen, placed 2 of each passive mob in and gave myself wheat and carrots. With the carpets on, I used the mob's breeding food to try to entice them out of the pena and all but the rabbits were not able to escape the pen. (I really expected the other animals (no chickens) to be able to escape as well.) I then took the carpet off the fence and none of the animals were able to escape, even the rabbits.

Rabbits can no longer be tamed...

Confirmed for 1.8.1-pre3
Both carrots and dandelions do this.

Confirmed for 1.8.1 with carrots.

Can confirm for 1.8.2-pre1