2,543. A Protruding Organ

Hilchos Shechita 6:15

If one of an animal's digestive organs sticks out of its body but isn’t punctured, the animal remains permitted. If the organ gets inverted, the animal is a treifa even if the organ isn’t punctured. This is because once an organ has been inverted, it won’t return to how it was and the animal won’t survive.

Hilchos Shechita 6:16

The last digestive organ is straight rather than curved, waste is removed from it near the genitals, and it’s connected between the thighs; this is called the colon. If it’s even slightly punctured, the animal is a treifa, the same as with all the other digestive organs. This is the case when the hole faces the stomach cavity: if the hole is where the colon joins between the thighs, the animal remains permitted. Even if the whole spot where the colon joins between the thighs is removed, the animal remains permitted so long as at least four finger-widths remain in the case of an ox (and a proportionate length in other animals).