Can you recount the story involving the hungry dog and pig and explain how Sai Baba used it to teach a devotee about service?

Chapter 9 narrates a story where a lady feels compassion for a hungry dog and a pig. Later, Sai Baba tells her he is completely satisfied and still belching from the "bread of love" she served. The lady is confused, but Baba reveals his mystical nature by explaining his oneness with the very animals she encountered. He states, "that dog which you saw suddenly, I have oneness with him... Similarly, the pig smeared with mud all over... I have oneness with him." This profound experience teaches her that feeding any hungry creature is equivalent to feeding Baba himself, making her understand the true meaning of service and devotion.