Reference for Chullin 153:30

עור הרי הוא כבשר

IF AN ANIMAL WHICH WAS WITH YOUNG FOR THE FIRST TIME CAST FORTH AN AFTERBIRTH, IT MAY BE THROWN TO DOGS;<span class="x" onmousemove="('comment',' It is in no wise regarded sacred as a firstling for, in the first place, it might have contained a female young which is not sacred; and even if we assume that it did contain a male young, there is the further possibility that it was a male young of a species of animals different from its dam vnsb');">²⁰</span>

Jastrow

Jastrow

Jastrow

Jastrow

Jastrow

Jastrow

Jastrow

Jastrow

Jastrow

Jastrow

Jastrow

Jastrow

Jastrow

Jastrow