Hukasin® Spot On Tick and Flea Protection for Dogs Hukasin® Spot On offers long-lasting tick and flea protection for up to 12 weeks without harming your dogs health. Made from carefully selected ingredients, it reliably protects your dog from parasites. Method of application Open the sealed tube and apply a thin strip of the product from the back of the dogs neck to the base of the tail. Part the fur to ensure direct skin contact. Do not use this product on pregnant or lactating animals and puppies under 12 weeks old. Read the instructions carefully before use. Consult a veterinarian if you experience any intolerances or have any questions.