M-pets tears stain remover is suitable for all pets – dogs and cats especially those with light colored coats suffering from tear stains. On regular use, it removes tear stains and prevents them from reoccurring. Tears stains can be formed normally in a healthy dog or cat or due to an underlying conditions like glaucoma, allergy, hair around eyes etc – if such is the case, only treating that condition will stop tear stains from reoccurring. Tear stain is not like dirt stain that one application will remove it. It needs to be used regularly to prevent staining and color improvement below the eyes. Completely safe to use.