NexGard (afoxolaner) is FDA approved for veterinarian use, and demonstrated 100% effectiveness against adult fleas 24 hours post-infestation for 35 days
NexGard not only kills both fleas and ticks, it's also in the form of a soft, beef-flavored chew. Which, in a recent study, 89% of dogs readily consumed.
Dont wasted your time looking for spray,shampo,a home remedi from youtube, if you really want to kill those parasite,get the right thing,i have a poor infected dog,that even blood was coming out of the skin,and who ever that has a dog should know about this tablet,dont fall into the hipocracy that "ohg my dog never get fleas," yeap right,they use this and dont tells no one around him
Two good webpage to look more info i have attached below