The wound was small in May 2017, but the owner did not have time. Now it is really gigantic and deep when the owner consulted me.
In May 2017, he had a broken leg. Plaster of Paris cast was advised as he had severe skin disease. Open reduction would lead to bone infections. He is no longer lame now. But the large elbow wound was irritating him.
Skin wounds are best treated early to prevent licking and widening. Bacterial infections lead to more itchiness and intense licking, deeping the wound as in this case.