Animal testing
(ה) כִּֽי־תִרְאֶ֞ה חֲמ֣וֹר שֹׂנַאֲךָ֗ רֹבֵץ֙ תַּ֣חַת מַשָּׂא֔וֹ וְחָדַלְתָּ֖ מֵעֲזֹ֣ב ל֑וֹ עָזֹ֥ב תַּעֲזֹ֖ב עִמּֽוֹ׃ (ס)
(5) When you see the ass of your enemy lying under its burden and would refrain from raising it, you must nevertheless raise it with him.
(ד) לֹא־תַחְסֹ֥ם שׁ֖וֹר בְּדִישֽׁוֹ׃ (ס)
(4) You shall not muzzle an ox while it is threshing.

“Of all that the Holy One, blessed be He, created in His world, He did not create a single thing without purpose.” - Talmud Shabbat 77B

“These creatures were created to serve man and man was created to serve his Creator."

- Talmud Kidushin 82A