Spray daily onto backs of ears and gently rub in. (spray into your hand, near their ears, then make a fuss rubbing into the soft parts at the base of the backs of the ears.
They will get used to the spray sound and learn to love it.
Cats -1 squirt each ear
Dogs –up to 3 squirts each ear, depending on size. (1 squirt for small, 2 squirts for medium and 3 squirts each ear for large dogs)