Covering the blood of the chicken by Kaparos:^[1]

It is a Mitzvah for the Shochet to cover the blood of slaughtered fowl with earth or straw.[2] It is nevertheless permitted for the Shochet to honor the owner of the chicken to do so in his place.[3] Earth or straw is to be set up near the slaughtering area and the Shochet then drips some blood onto it.[4] Before covering the blood one says the blessing of “Al Kisoi Dam Beafar[5].”[6] After the Simanim of the chicken, and the knife, are checked and the chicken is verified as Kosher, one says the blessing and then covers the blood.[7] [If the Shochet does not check the knife beforehand, one is to cover the blood without a blessing, or leave it to the Shochet to check at the end of the Shechita, when he checks his knife.[8] In all cases, one should have in mind to not be Yotzei the blessing of another person saying it, or is to make an interval in between.[9]]

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^[1] See Shulchan Aruch Yorah Deah Chapter 28

[2] Michaber Y.D. 28:1 and 8 “The one who slaughters is to cover”; Mishneh Chulin 83b; See Tur 28 and Michaber C.M. 382 regarding the law if someone stole his Mitzvah and covered the blood without his permission

[3] See Simla Chadash 28 and Mateh Asher ibid [Vetzaruch Iyun when doing this one after another why this does not transgress the adding of Brachos Sheinan Tzerichos, and that the previous person who heard the blessing was already Yotzei.]

[4] Michaber 28:5; Rebbe Zeira Chulin 83b

[5] And not Ba-afar. It is said with a Segol and not a Kamatz.

[6] Michaber 28:2; Rambam Shechita 14; Tur 28 in name of Rosh

[7] Michaber 28:19; Tur 28; Simla Chadasha 28:23

[8] See Michaber ibid;

[9] See Admur 213:4