A blood test needs to be done before starting the med and most vets repeat yearly. It is given monthly as a pill, chew or over-the-shoulder application.
The ones I'd consider are Interceptor, Sentinel, Heartgard or Heartgard Plus.
Most of the other ones I would not trust at all.
__________________ Crystal  , Ellie May (RIP)  , Rylee Finnegan  , and Gracie Boo🐶 |