IF YOU GIVE YOUR DOGS THE LIQUID IVOMEC, PLEASE READ THE FOLLOWING:
I took my female into Brittmoore Animal Clinic in Houston (very well respected) for a progesterone test. They used the same blood sample to run a heartworm check on her. I have been using Ivomec for over 30 years faithfully, each and every month, and have never had a dog come back with positive results. Well, my female has a mild case of heartworms. I was told by the vet at Brittmoore that they are seeing a lot of test/trial dogs (I am assuming this is due to the fact that so many of us with multiple dogs use it) that are coming back positive for heartworms. Cases are showing up from Mississippi to the Texas coast region. If you fall into this category, PLEASE have your dogs checked as soon as possible and change to another form of prevention. Positive cases are not showing up for dogs using Heartguard or Sentinel, just the liquid form of Ivomec. I now have to have my other 6 dogs tested.
Yes, it will cost more money each month to treat them with a prescription preventatives, but nothing compared to the expense of having to put your dog through the treatment (or worse)