Quote:
Originally Posted by Maximo  I understand, and I will read up on the potential failure rate. As you know, annual testing is required for all of the preventatives for the prescription and the guarantee offered by manufacturers. I've read in previous threads that quite a few people here test more than once a year. |
Yes, I see the testing is required.
. I had put it in my first post that it was for the links but I think it wasn't clear to some so I felt I needed to clarify that.
The point was that Merial was claiming it was 100 percent effective but it's looking like it isn't so some pet owners are not happy when the testing is coming up positive for heart worms, and rightly so. I don't know if it's just Heartgard Plus or if it includes Heartgard too.