When according to Halacha you are obligated to be Metzaer Baalei Chaim?
closed as not constructive by Isaac Moses♦ Jun 17 '11 at 21:55
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- When a king dies, his horses are hamstrung (Avodah Zara 11a)
- Animals used by idolators (Avodah Zara 13a)
- Hekdeishos, Charamim and Arachin (various types of consecrated animals) B'zman Hazeh (nowadays, in the absence of the Holy Temple) (Avodah Zara 13a)
- Chataos Ha-Meisos (Temurah 15b)
(Already dealt with here on Mi Yodeya... see Why must Chata'os Ha-meisos be treated so harshly?)
When doing Shluach Haken
When your friend has an animal that needs unloading and your enemy has an animal that needs to be loaded, you are supposed to help your enemy first even though the animal that needs unloading is in pain.