I was talking to enderio devs about chickens mod chicken not spawning in spawners. They said they could
Do it then they looked into it and they said they couldnt because the following code is invalid in 1.12 @Mod(modid = ChickensMod.MODID, name = ChickensMod.NAME, version = ChickensMod.VERSION, acceptedMinecraftVersions = "[1.12, 1.12.2]", dependencies = "required-after:forge@[14.21.1.2387,);") @EventBusSubscriber public class ChickensMod { public static final String MODID = "chickens"; public static final String VERSION = "@VERSION@"; public static final String CHICKEN = "ChickensChicken"; public static final String NAME = "Chickens"; public static final Logger log = LogManager.getLogger(MODID);

Was this conversation on github? got a link?

Also would it be possible to do somethink like this but you may suggest to GenDeathrow to split the entity into multiples, e.g. "chicken1" for sum(data) 0 to 10, "chicken2" for 11-20, ... that would make it easy for all mods that have spawning to configure different cost without having to add special cucken code

hopefully should be fixed on latest version