Groomers Buttermilk Spa Rinse Conditioner A hydrating conditioner developed to keep hair soft & tangle free. Specially formulated with cat friendly ingredients. Ideal for long haired cats, helps to reduce hairballs. p H balanced & made with cold-pressed evening primrose oil. 300ml. Groomers Buttermilk Spa Rinse Conditioner is a rich, hydrating formula specially developed for use with cats. Perfect for use with medium to long coats, this moisturising treatment contains pure cold-pressed evening primrose oil to help keep fur silky, soft & tangle free. Also helps to reduce hairballs. Please browse our full Cat Bathing range.