Flowers are growing out of the ground and over your pet pig's forehead and it's causing the poor thing to live in total darkness. The flowers are hanging down over its eyes and won't let any light in at all. And some of the flowers seem to be growing directly out of the pig's forehead too. The pig has just been wandering and bumping into things all day because of it.
おお, くら, こうむ
To end the darkness you mow (もう) the flowers. You have to drive your lawnmower over its head too, because they're growing out of its forehead too. They'll grow back soon though and cover your pig's world in darkness once again and you'll have to do it all over again.