Safety of Galvanized Watering Buckets for Dogs

Farmers routinely use galvanized buckets and watering troughs for horses and livestock, so the use of these containers for dogs is considered safe. Ensure that the metal remains intact and does not get damaged, however, as this impairs the zinc coating and may release harmful toxins.

  1. Galvanization

    • Galvanization is the application of a zinc coating to metal. This is done by electroplating the metal using a galvanic cell, or by a process known as hot dip zinc coating. Hot dip zinc coating is more commonly used on inexpensive items such as buckets and produces a thick, durable coating. The zinc surface prevents the corrosion of the metal and lengthens the useful life of the product.

    Toxicity of Galvanized Metal

    • Zinc galvanizing tends to give off toxic fumes when it is heated. If you heat galvanized steel, a toxic gas is created called zinc oxide. People who work regularly with heated zinc sometimes get metal fume fever, which causes what is known as the "zinc shakes." It is not a fatal condition and wears off in a few days. As dog watering buckets are not usually heated in any way, there is no risk of toxicity from fumes.

    Food Preparation and Storage

    • When acidic foods are stored in galvanized utensils, or when food is cooked in galvanized containers, toxic amounts of zinc sometimes enter the food. According to the U.S. Department of Health and Human Services 1997 Food Code, "galvanized metal may not be used for utensils or food-contact surfaces of equipment that are used in contact with acidic food." This is generally understood to mean that the use of galvanized metal in contact with meat and non-acidic fruits and vegetables is acceptable, but because the preservatives in certain foods also interact with the zinc, it is usually not used for food. The use of galvanized containers for watering dogs does not apply.

    Common Uses of Galvanized Products

    • Galvanized buckets and troughs are used in the home and garden for decorations such as plant and flower arrangements, and for practical purposes such as the watering of horses, garden watering cans and the collection of sap from maple trees. Use as dog watering buckets is entirely safe, provided the buckets are in good condition and are used only for cold water.