Emily M. Austin Recounts Joseph Smith performing an animal sacrifice during a treasure hunt on Joseph Knight's Farm in 1826.
Emily M. Austin, Mormonism, Or, LIfe Among the Mormons Being an Autobiographical Sketch; Included An Experience of Fourteen Years of Mormon Life (Madison, Wisconsin: M. J. Cantell, 1882), 32-33
Old Uncle Joe, as we called him, was a wool carder, and a farmer; yet he abandoned all business, and joined with a number of others, to dig for money on his premises. While I was visiting my sister, we walked out to see the place where they had dug for money, and laughed to think of the absurdity of any people having common intellect to indulge in such a thought or action. However, all of those things had long since become oblivious; for in the time of their digging for money and not finding it attainable, Joe Smith told them there was a charm on the pots of money, and if some animal was killed and the blood sprinkled around the place, then they could get it. So they killed a dog, and tried this method of obtaining the precious metal; but again money was scarce in all those diggings. Still, they dug and dug, but never came to the precious treasure. Alas! how vivid was the expectation when the blood of poor Tray was used to take off the charm, and after all to find their mistake, that it did not speak better things than that of Abel. And now they were obliged to give up in despair, and Joseph went home again to his father's, in Palmyra.