Wonderous in its effectiveness.
Easypeasy.....worked a treat with our elderly (16 years) miniature poodle. Only slight problem was that he hated the taste so I added a little honey to 4 teaspoons of Organic Apple Cyder vinegar in 1 litre of purified water then shook it well until it was combined. We gave it as his normal drinking water which he now drinks without any hesitation whenever he goes to it.
We also tried the topical (neck scruff and paws) with the 50/50 ACV/Water dilution but the smell was too strong and we feared damage to the carpets, furniture and bedding. We now apply it only when he is to be confined to his own area and being totally blind that is his portable child's playpen for his own safety.
Recommend this treatment....CERTAINLY and without reservations.