Eating a limb from a live animal created through “Sefer Yetzirah”

The Shlah (author of “Shnei Luchot ha-Brit”) writes that the brothers ate a limb of a living animal created through “Sefer Yetzirah”, and I am having difficulty understanding the difference between this and a regular animal. How do we know that it is permissible to eat a limb from a live animal created through “Sefer Yetzirah”? (This refers to the Rashi commentary to verse Genesis 37:2, in which Rashi states that Joseph told his father Jacob that he saw his brothers eat a limb of a living animal.)

Dear …!
Chacham Tzvi (Ch. 93) indeed discusses whether a being created through “Sefer Yetzirah” has the status of a human and the status of a Jew. However, his son (Divrei Rav Meshulam, Ch. 10) brings a handwritten note written by Chacham Tzvi himself, where he writes that after seeing in the works of the Ramak that a creature created through “Sefer Yetzirah” lacks “nefesh”, “ruach” and “neshamah” and only possesses simple vitality, it became obvious to him that it does not have the status of a human in any way, and by the same token, it lacks the status of an animal. And certainly, since it has no soul, there is no prohibition on eating a limb from a live animal, as this very prohibition is learned from the verse (Genesis 9:4) “Only flesh with the soul thereof, which is the blood thereof, shall ye not eat”.

Chacham Tzvi (Ch. 93), Divrei Rav Meshulam (Ch. 10)