These are often the products people mistakenly use for caging materials. Examples include wire mesh material, rabbit cage material, soldered mesh and the like. Cadmium is extremely poisonous. Mercury is less commonly available around the home. Mercury is highly toxic when ingested and is even toxic when it contacts skin.
Mercury vapors are extremely toxic, often causing severe pneumonia.
Zinc is used in soldering compounds, galvanized wire, batteries, and certain paints. Zinc is not very toxic. In fact, zinc is a trace element that is required in the diet. A zinc deficiency causes anemia and retardation of growth and development. Significant excesses are toxic and produce signs similar to lead poisoning.