I raise and breed schnauzers I have used sentinel for 10 yrs Never had flees or worms. Puppies are not born with worms either. We have 10 adults ages 1 & up. No health issues and they live to 15 yrs old on avg. outstanding for schnauzers. We have been breeding for 20 yrs and I have never found another product safe for breeding and nursing puppies. No birth defects

It helps me to keep those nasty pests at bay. Using for months, no complaints and it does the works effectively.

I have been using this for my 2.5-year-old Pomeranian since he was 3 months old and he’s never had a problem with fleas, heartworm or worms. He loves the chew and thinks it’s a tasty treat. No side-effects. Thumbs up!