Custom Grass block - eatable for animals

[NightAnasazi]

 

Hi. I created a custom grass block (as below) and everything works as it should, except the sheep don't eat the grass. I can't find anything about how to force a block to be consumable. Can anyone suggest what to look for?
 

public class GrassesBlock extends GrassBlock implements BonemealableBlock {
 
    public GrassesBlock() {
        super(BlockBehaviour.Properties.copy(Blocks.GRASS_BLOCK));
        this.registerDefaultState(this.defaultBlockState());
    }

And then many methods like canSustainPlant or isValidBonemealTarget