Exploring the Halacha of Tza'ar Ba'alei Chaim. This is related to Parshas Mishpatim where the Torah discusses the Halacha of Perikah - the obligation to unload an animal of a heavy load and alleviate his pain.  We discuss other sources for this prohibition, and if it is min haTorah or mid'Rabanan. We also discuss:

Animal suffering vs human need

Medical experiments on animals

Hunting for sport

Killing insects

Tza'ar Baalei Chaim of a human

and many other scenarios.