What is a permanent mark placed in an animal's ear using ink called?

A permanent mark placed in an animal's ear using ink is referred to as a tattoo. This method is commonly used in animal identification because it provides a lasting and identifiable mark that is less likely to be removed or altered compared to other methods like labels or tags. Tattoos can convey important information about the animal, such as its registration number, ownership, or health records, and are often used in contexts such as livestock management and veterinary care.

The process involves using a special ink that is specifically formulated for use on skin, allowing for clear visibility and durability. This technique is typically less painful for the animal compared to branding, which involves burning the skin. Since tattoos are applied to the ear—an area often kept free of hair—it allows for easy visibility and can be read without much intervention.

In contrast, other methods such as labeling might involve physical tags that can be lost or removed, while branding usually refers to the practice of marking the skin through heat and can be more invasive and painful for the animal. Thus, the use of tattoos represents a practical and humane approach to permanent identification in agriculture and animal husbandry.