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When an animal eats in the public domain, how do we calculate damages? The shiur explores whether you pay based on what you would have spent to feed your animal (Rashi (רש"י)'s approach of hanoa/benefit), or based on what was actually taken from the property owner (the Rambam (רמב"ם)'s approach of hezek/damage). The resolution affects whether you pay for expensive food eaten even though you normally feed cheaper food.
This shiur analyzes the fundamental dispute between Rav and Rava regarding damage payments when an animal eats in reshus harabim (the public domain). The Gemara (גמרא) discusses a case where an animal eats expensive food like se'orim (barley), but the owner normally feeds only cheaper food like kash (straw). Rabbi Zweig begins by examining Rashi (רש"י)'s interpretation. According to Rashi, even though the owner normally feeds his animal kash, he must pay for se'orim at wholesale price (mezaro bazo) when his animal eats it in reshus harabim. This raises a fundamental question: why should someone pay more than what they would have normally spent? Rashi appears to hold that this is a din of hanoa (benefit) - since the animal received benefit from the better food, the owner must pay for that benefit. The measure of benefit is determined by how much money was saved - what one would have had to spend to provide that food.
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Bava Kamma 20a
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