Actually, snakes aren't concerned about presentation as far as food is concerned - they swallow it whole. Most snakes are equipped with jaws that are very loosely connected so their mouths can open extremely wide. It's quite possible for a snake to swallow prey bigger than its own head. Besides their unique table manners, snakes also have specialized eating utensils including teeth or fangs that curve back. This helps them get a firm grip on their prey.
Some snakes have fangs that contain venom, a sure fire way to quickly kill victims.
But most snakes, like Montshire's boa constrictors Al and Victoria, are not venomous. Constrictors wrap themselves around their prey, squeezing it in their coils. Then the snake begins the process of swallowing its dinner whole. Friday Snakes are cold blooded, which means the temperature of their bodies is closely related to the temperature of the air. When the air is cool, snakes often bask in the sun, raising their body temperature above the air temperature.