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.