If you just wash your feet with plain water, it is not harmful for the cat to drink it. If there are other ingredients added to the foot washing water, then the cat may have an impact on the body after drinking it, and there are many bacteria on the feet, so the foot washing water is not harmful. It is clean, so it is best not to let cats drink foot washing water. In addition to foot washing water, cats also like to drink toilet water, dishwashing water, etc. Because these waters have a special taste, cats prefer them.