Pet food and water bowls are a significant hygiene concern in most homes — they accumulate bacteria far faster than most owners realize. A 2017 study by the NSF (National Sanitation Foundation) ranked pet bowls as one of the top five most germ-laden items in the average home, specifically because they are rarely cleaned thoroughly or frequently enough.
Frequency
- Food bowls: wash after every meal — bacteria from wet and raw food multiply rapidly at room temperature
- Water bowls: wash daily — a slimy feel is biofilm (a bacterial colony); if the bowl feels slippery, it has significant bacterial growth regardless of how clear the water looks
Washing
- Wash food and water bowls in hot, soapy water using a dedicated sponge or cloth — do not wash pet bowls with the same sponge used on human dishes, to prevent cross-contamination
- Scrub the interior thoroughly, including the bottom and sides where biofilm accumulates
- Rinse thoroughly — dish soap residue can cause digestive upset in dogs and cats
- Allow to air dry or dry with a clean towel before refilling
Dishwasher
- Most stainless steel and ceramic pet bowls are dishwasher safe — check the bowl's care instructions
- Run on the hottest cycle available; the high heat sanitizes effectively
- Plastic bowls should be checked for dishwasher compatibility — high heat warps many plastics and creates microscopic scratches that harbour bacteria
After Raw Food
- After raw meat or raw food diets: disinfect by soaking in a diluted bleach solution (1 teaspoon bleach per 4 cups water) for 10 minutes, then rinse very thoroughly — raw food harbours Salmonella and other pathogens that regular dish soap doesn't eliminate
Bowl Material Comparison
- Stainless steel: easiest to clean and disinfect, non-porous, durable — best choice for hygiene
- Ceramic: good if uncracked and food-safe glazed; cracks harbour bacteria — replace chipped ceramic bowls
- Plastic: scratches easily over time and scratches harbour bacteria despite washing — the least hygienic option for long-term use