Halakhah for Chullin 141:20
ולרבנן האי קרא למה לי
[the periods prescribed] for a male, and if it was a female she must observe [the periods prescribed] for a female; if its sex was not known she must observe [the periods prescribed] both for a male and for a female.<span class="x" onmousemove="('comment',' The stricter aspect of each is applied to the mother, viz., fourteen days of uncleanness (as if it were a female) and only twenty-six days of purification (as if it were a male, and the total of days must not exceed forty) .');"><sup>11</sup></span>
Sefer HaChinukh
That we not eat the blood of a [domesticated] beast, a [wild] animal or a bird: That we not eat the blood of a [domesticated] beast, a [wild] animal or a bird (Keritot 20b), as it is stated (Leviticus 3:17), "And any blood you shall not eat.' And it is stated in another place (Leviticus 7:26) - "from a bird or a beast" - and a [wild] animal is included in "beast" (Chullin 71a). And the prevention of blood is repeated in many places in the Torah.
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