Responsa for Bekhorot 47:26
מי קתני הוא
What he means is this:<span class="x" onmousemove="('comment',' And in either case it is exempt from the law of the firstling, for we only entertain a doubt that it might be a stranger if the animal had given birth previously. But in respect of the infringement of the prohibition of killing the animal and its young on the same day, there is a doubt.');"><sup>14</sup></span>
Teshuvot Maharam
Q. A bought from a Gentile a cow that already was yielding milk. Should the cow bear a male calf in A's house, would such calf be unfit for eating purposes for fear lest it be a firstling?
A. The fact that a cow yields milk is no proof that she has already given birth to a calf, for it sometimes happens, though very rarely, that a cow yields milk even though she has not as yet given birth.
SOURCES: Cr. 312; L. 187; Orhot Hayyim p. 21. Cf. Moses, Minz, Responsa 34; ibid. 35; Terumat Hadeshen 271; Isserlein, Pesakim 129; ibid. 167.
A. The fact that a cow yields milk is no proof that she has already given birth to a calf, for it sometimes happens, though very rarely, that a cow yields milk even though she has not as yet given birth.
SOURCES: Cr. 312; L. 187; Orhot Hayyim p. 21. Cf. Moses, Minz, Responsa 34; ibid. 35; Terumat Hadeshen 271; Isserlein, Pesakim 129; ibid. 167.
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