To shed its skin a snake will rub its head against a rock, tree or some stable object to loosen it's old skin and will then crawl slowly forward, turning this old skin inside out as it advances like when you pull your foot out of a sock. All snakes are predators, eating meat only. They capture their prey in one of three ways. Some catch and swallow their prey immediately. Others catch their prey, then constrict it until the animal is dead.
Poisonous snakes use a toxin that immobilizes or kills their prey.
Snakes can dislocate their jaw so they can swallow prey much bigger than themselves. Poisonous snakes have two specialized hollow teeth called fangs. Fangs are attached to venom glands which produce poison. The eastern hognose snake also has enlarged non-poisonous fangs located in the rear of its mouth which are used for deflating toads, their favorite prey. Fangs are not found in all snakes, but all snakes do have teeth, usually six rows worth.