Why does the Torah write "Ish Ish"?
Torah Temimah (citing Toras Kohanim): To teach us that, even if the Shochet did not actually hunt the bird but purchased it, inherited it or received it as a gift, he is nevertheless obligated to cover its blood.
Targum Yonasan: Refer to 17:3:1:1*.
Why does the Pasuk insert the word "Tzeid"?
Rashi: To include the obligation to cover the blood of chickens and geese, even though they do not need to be caught.
And what does "Asher Ye'achel" come to preclude?
Rashi: It comes to preclude non-Kasher birds from the Mitzvah.
Targum Yonasan: It comes to preclude birds that became Neveilos via an improper Shechitah.
Why does the blood of Chayos and birds require covering?