First, I would like to explain something about sentinel and sentinel spectrum.
These two drugs do NOT kill adult fleas or eggs. If a flea bites your dog, this drug simply sterilizes the flea, so that flea can no longer reproduce.
Sentinel provides the flea sterilization, as well as prevention for heartworms, hookworms, roundworms and whipworms. It comes in a tablet form. Sentinel spectrum is a smaller chewy square that works for all of the above and tapeworms. Both are dosed monthly.
Secondly, to the person who was livid because they found fleas and ticks on their dog after using bravecto, please understand that this drug does not repel parasites. It only starts to kill them after they bite.
