Flying baby pigs on chickens constantly from the sky. Help

[ninono]

I've been using ftb direwolf20 modpack and this happend (look at the schreenshot).
Baby pigs on chickens are constantly flying from the sky, and when they hit then ground they disapear and reapear in the sky. Please help me get rid of them.

 

[GTAVC16]

http://forum.feed-the-beast.com/threads/falling-explosive-chickens-with-pig-from-the-sky.37129/

please look through the forums, before you open a new thread, it is litterally just 3 Threads under yours...