Dog Foodies

The Gemara in Shabbos teaches us that one is not allowed to expend any effort on Shabbos to feed animals that are not his. The Mishnah Berurah therefore questions the custom some have of feeding the birds on Shabbos Shirah. Many families have opted to fulfill the custom by putting out bird food before Shabbos. The Aruch HaShulchan, however, defends the practice and explains that the real reason we feed the birds is to recall the miracles of Keriyas Yam Suf and the manna. Feeding the birds is just a device to encourage us to contemplate our history. Therefore, since we are feeding the birds for our own sake, it is permitted on Shabbos.
The Gemara offers one exception to the above rule. One is allowed to feed wild dogs on Shabbos. Often their food supply is limited and it is considered an act of compassion to feed them. Interestingly enough, the Magen Avraham even considers it a mitzvah to feed wild dogs. However, the Gemara makes clear that this should not be done on a constant basis, and only a small amount of food should be offered to them. To help dogs deal with scarcity of food resources, Hashem created them with slow digestive systems. A dog’s body can take up to three days to digest food. Apparently, this relieves the dog’s suffering by making it feel fuller longer.