When disease descended upon the Krachi people in the form of a human-flesh-eating giant bird, Wulbari, the heaven god and creator of the humans sent a dog with the medicine to cure them.
On his way to deliver the medicine, the dog saw a bone. The dog put the medicine down and started crunching on it.
Unbeknown to the dog, the goat picked up the medicine and gave it to the grass instead of the humans.
That is the reason why the grass comes back every year, whereas people die.