The document discusses differing opinions among rabbis - Rebbi Yehuda, Rebbi Eliezer, and Rebbi Meir - on how much effort is required to properly guard an animal from causing damage. Rebbi Yehuda says minimal effort is sufficient for a known damaging animal, while Rebbi Eliezer says the only proper guarding is with a knife. The document also analyzes opinions on which cases the mishna refers to - whether all cases of known damaging animals, or specifically tooth and foot damage cases.

1. Gemara Notes p. 14 גמרא דף נה עמוד ב

2. אמר ר ' מני בר פטיש : Who is the Tanna of our Mishna that holds that a “low level guarding” is good enough for a מועד type of damage? It could even be ר ' מאיר : He would hold that שן and רגל of the Mishna are different than קרן because the Torah limited how much you have to guard from them It must be ר ' יהודה , because our Mishna is discussing מועד , just as he was How well does one have to guard his animal? If the owner tied up his ox with a rein, or locked it up properly, and it escaped and damaged… What defines “properly” or “improperly”? A gate that can withstand a normal wind is considered locking up properly. A gate that could not withstand a normal wind is considered locking up improperly. תנו רבנן רבי יהודה says: Minimal effort in guarding is enough by a מועד . So if the animal was מועד the owner would be פטור . But the owner of a תם must do extra guarding, and is חייב . רבי אליעזר says: The only way of really guarding it is with a knife רבי מאיר He must pay, whether it was תם or מועד

3. The Rules of Guarding The Rules of Guarding מועד רבי אלעזר רבי יהודה רבי מאיר High level Guarding Low level Guarding רבי אלעזר רבי יהודה רבי מאיר מועד תם