(4) You shall not muzzle an ox while it is threshing.
(6) If, along the road, you chance upon a bird’s nest, in any tree or on the ground, with fledglings or eggs and the mother sitting over the fledglings or on the eggs, do not take the mother together with her young. (7) Let the mother go, and take only the young, in order that you may fare well and have a long life.
(ח) זָכ֛וֹר֩ אֶת־י֥֨וֹם הַשַּׁבָּ֖֜ת לְקַדְּשֽׁ֗וֹ (ט) שֵׁ֤֣שֶׁת יָמִ֣ים֙ תַּֽעֲבֹ֔ד֮ וְעָשִׂ֖֣יתָ כָּל־מְלַאכְתֶּֽךָ֒ (י) וְי֙וֹם֙ הַשְּׁבִיעִ֔֜י שַׁבָּ֖֣ת ׀ לַיהוָ֣ה אֱלֹהֶ֑֗יךָ לֹֽ֣א־תַעֲשֶׂ֣֨ה כָל־מְלָאכָ֡֜ה אַתָּ֣ה ׀ וּבִנְךָֽ֣־וּ֠בִתֶּ֗ךָ עַבְדְּךָ֤֨ וַאֲמָֽתְךָ֜֙ וּבְהֶמְתֶּ֔֗ךָ וְגֵרְךָ֖֙ אֲשֶׁ֥֣ר בִּשְׁעָרֶֽ֔יךָ
(8) Remember the sabbath day and keep it holy. (9) Six days you shall labor and do all your work, (10) but the seventh day is a sabbath of the Eternal your God: you shall not do any work—you, your son or daughter, your male or female servant, or your cattle, or the stranger who is within your settlements.
(א) אָסוּר מִן הַתּוֹרָה לְצַעֵר כָּל בַּעַל חָי. וְאַדְּרַבָּא, חַיָב לְהַצִּיל כָּל בַּעַל חַי מִצַּעַר, אֲפִלּוּ שֶׁל הֶפְקֵר, וַאֲפִלּוּ שֶׁל נָכְרִי. אַךְ אִם הֵם מְצַעֲרִין לְאָדָם, אוֹ שֶׁצָּרִיךְ הָאָדָם לָהֶם לִרְפוּאָה אוֹ לִשְׁאָר דָּבָר, מֻתָּר אֲפִלּוּ לְהָרְגָן, וְאֵין חוֹשְׂשִׁין לְצְַעֲרָן, שֶׁהֲרֵי הַתּוֹרָה הִתִּירָה שְׁחִיטָה. וְלָכֵן מֻתָּר לִמְרֹט נוֹצוֹת מֵאַוָּזוֹת חַיּוֹת אִם אֵין לוֹ נוֹצָה אַחֶרֶת, רַק שֶׁהָעוֹלָם נִמְנָעִים מִשּׁוּם אַכְזְרִיוּת.
(ב) סוּסִים הַמּוֹשְׁכִים בַּעֲגָלָה וְהִגִּיעוּ לְמָקוֹם מְקֻלְקָל אוֹ לְהַר גָּבוֹהַּ, וְאֵינָן יְכוֹלִין לִמְשֹׁךְ בְּלִי עֵזֶר, מִצְוָה לַעֲזוֹר אַף לַנָּכְרִי מִשּׁוּם צַעַר בַּעֲלֵי חַיִּים, שֶׁלֹּא יַכֶּה אוֹתָם הַנָּכְרִי מַכָּה רַבָּה לִמְשֹׁךְ יוֹתֵר מֵאֲֹשֶר בְּכֹחָם.
(ג) אָסוּר לִקְשֹּׁר רַגְלֵי בְּהֵמָה חַיָה וָעוֹף בְעִנְיָן שֶׁיִהְיֶה לָהֶם צַעַר (עַיֵן לְעֵיל סִימָן פז סָעִיף ז).
(ד) אָסוּר לְהוֹשִׁיב עוֹף עַל בֵּיצִים מִשֶׁאֵינוֹ מִינוֹ, מִשּׁוּם צַעַר בַּעֲלֵי חַיִּים.
1. It is forbidden, according to the law of Torah, to inflict pain on any living creature. On the contrary, it is our duty to relieve the pain of any creature, even if it is ownerless or belongs to someone else. However, if they cause trouble, or if they are needed for medicine, or for any other human need, it is permissible to kill them, and we disregard their pain, for the Torah has permitted the slaughter of animals. Therefore, it is permitted to pluck feathers from a living goose with which to write if no other pen is available. However, people usually do not do so because of cruelty.
2. When horses, drawing a cart, come to a rough road or a steep hill, and it is hard for them to draw the cart without help, it is our duty to help them, even when they belong to someone else. We do this to prevent the owner from killing them while trying to force them to pull more than they can.
3. It is forbidden to tie the legs of an animal or bird in a way that causes them pain.
4. It is forbidden to set a bird on eggs that are not of their species, for this is cruelty to animals.