Each tablet contains 18.8 mg Afoxolaner and 3.8 mg Milbemycin

NexGard SPECTRA have been shown to be safe and effective in various breeds of dogs when used as directed and, can be given to puppies from 8 weeks of age, providing they weigh at least 2 kg.

If he is exactly 15 kg you can use the medium size.

If it is round 15 kg., this product should be good enough. But it is more than half a kilo heavier then you should consider using the NG Spectra for large dogs.

NG Spectra treats, ticks, fleas, heartworms and most common intestinal parasites: roundworms, whipworms and hookworms. The most cases Nexgard spectra should provide enough coverage for your pet.