Rather then doing itemStack.getItem() == Items.SHEARS could the code be changed to FabricToolTags.SHEARS.contains(itemStack.getItem()) in ModEvents.java, MoobloomEntity.java, MoolipEntity.java, E2JBaseMonoColorSheepEntity.java, and E2JBaseShearableCowEntity.java?
This will allow this mod to easily work with mods that add custom shears.

If I have time I will try to put in a pull request.