NAYFLEE Spray has residual effect for 1 month against ticks and 1-3 month against fleas, depending upon the parasite challenge in the animal's environment. NAYFLEE Spray may be used on pregnant and lactating female dogs and cats and on unweaned puppies/ kittens. NAYFLEE Spray is safe to use in dogs and cats with no toxic effects when used as recommended by veterinarian. Assemble the spray by fitting pipe properly in the spray gun. Apply spray on body of the animal from a distance of 10-20cm against the direction of hairs until hair coat gets wet.