My mother purchased the Sentry Purrscriptions from her local Tractor Supply store in Michigan. Both of her cats, who were completely healthy before the application, became lethargic and aggressively ill and perished within a day of this medicine being applied. The flea medicine also did NOT kill the fleas, which I feel is salt in the wound here. My mother is devastated, I have never seen her this upset. I will be reaching out to every human being I can to get this product pulled from every store it’s sold in. Hopefully, enough people can come forward to fuel a class action lawsuit against this company so it can’t kill family pets anymore.