This was still happening to me as of 1.15.2, but it looks like it's not happening anymore in the 1.16 snapshots
Bump.
I think the lag spikes i was having may have caused the game to skip over those chickens from flapping :\
I trust you're trying this in 13w04a?
No, I just had faithful on my 1.4.6 client, then i used magic launcher to go to 13w04a to more easily switch back.
Probably should take out the red flash when hit, but otherwise works as intended.
Notice the flowing water, the chickens were also there for a long time. And there are a lot of chickens there to add on to that...
I can confirm, my server has been unable to update to the latest version. I checked the web page, and it still has the previous version of BDS for the Linux download link.