Humane societies and rescue organizations recommend that dogs and cats wear these tags, which present that the wearer is not a stray, and contain information to enable someone encountering a lost pet to contact the owner.
A collar-mount tag, either slide-on or riveted-on flat to a collar's surface, is silent.
[citation needed] Others believe that a lost pet might feel more comfortable and therefore be more likely to approach if strangers call it by its own name, so the name should be on the tag.
Plastic chips can be etched or printed, come in many colors, and may be highly reflective to enhance visibility at night.
Common metals used for pet tags are aluminum, stainless steel, and brass.