Applying Frontline to a cat is done by breaking open the applicator, parting the hair between the shoulder blades and emptying the container onto the skin. Apply Frontline every month to prevent fleas and ticks withhelp from a practicing veterinarian in this free video on pet care. Expert: Robert Sidorsky, DVM Bio: Dr. Robert Sidorsky has been a practicing veterinarian for more than 25 years. Filmmaker: Christian Munoz-Donoso