Halakhah for Chullin 166:18

From the laws of the commandment is, for example, that which they, may their memory be blessed, said (Chullin 83b) that covering of the blood is practiced with every bird and with every animal - whether it was at hand or it was not at hand. "Who hunts" is only stated for what is common, etc. And it is practiced with non-sacred animals, but not with consecrated ones. And it is practiced with the koy, because it is a doubt whether it is a type of animal or beast; but we do not recite a blessing on its covering, due to the doubt. And blood that splattered and that is on the knife is obligated in covering when there is no blood besides it. But if there is any blood besides it, he does not need [to do so], as it is written, "he must cover it with dirt" - its understanding is even some of its blood (Chullin 83b). And the one who covers it must put dirt below and above [it]. And any dirt in the world that is fine enough that a potter does not need to pound it, is fitting to cover [it] (Chullin 28a). And likewise, we [may] cover with all that is called dirt - even though it is not actually dirt, such as shaved gold, which is called dirt (dust), as it is stated (Job 28:6), "and it has gold dirt." And one who saw his fellow slaughter but not cover is obligated to cover; as it is stated about this commandment (Leviticus 17:14), "and I say to the Children of Israel" - and they, may their memory be blessed, elucidated, "this commandment is to all of the Children of Israel (Chullin 86-87a). And the rest of its details are in Chullin in the chapter [entitled] Kisui Hadam (see Tur, Yoreh Deah 28).