What is the loose skin on the back of a cat's neck called, and can it be grasped to pick up a cat?

The loose skin on the back of a cat's neck is called the "scruff." This area is especially significant in veterinary and animal handling contexts. Grasping the scruff is a common method used to pick up a cat, as this technique invokes a natural response in most felines, reminiscent of how a mother cat carries her kittens. When the scruff is held, it can provide a sense of security for the cat, as it reduces their ability to escape and allows for easier handling during examinations or procedures.

The other terms in the question relate to different parts of the cat's anatomy. While the "flank" refers to the side of the body and is not used for lifting, "collar" typically refers to a pet accessory that goes around the neck and does not involve the skin directly. "Neck flap" is not a standard term used in veterinary anatomy, making it less relevant in this context. Understanding the proper term and technique is vital for ensuring the safety of both the cat and the handler.