We had a small flea scare a few weeks ago and I used Comfortis. It worked and I want to keep her on it but I have no idea what heartwormj preventative to use with it? I remember seeing something about not being able to use a certain heartworm preventative with the Comfortis but I can't remember exactly what it was.
What heartworm would you suggest while knowing what Comfortis contains.
Thanks for any help.