This is for a Very Small dog size. 
Very Small Dog Size: 2kg - 4kg. 

NexGard is the first flea and tick treatment that comes as a tasty, beef-flavoured chew. The oral format also means no restrictions on swimming or bathing after treatment. 
NexGard is the first oral product that kills fleas, deadly Paralysis ticks, Brown Dog ticks, and Bush ticks on dogs for a full month. 
ONCE A MONTH TREATMENT: No more complicated treatments or confusing instructions – just one chew, once a month for year-round protection from fleas and ticks.