I agee with you trobin but it is the incorrect dosages that cause the most problems in my opinion and not enough is just a bad as too much. In most cases people don't have their hounds tested for heartworms and just start treating them not knowing if they have larva problems or full blown grown worms. My Vet had saved a dogs life from over dosing the week before I was in his office.roger,
heartguard's active chemical to kill heartworms is ivomectin. same as ivomec. ask heartgard how many free year supplies they gave out because dogs on there product tested posiive.
the point of this post was to educate people that ivomectin has been on the market since 1983! its time for research for a new product to prevent heartworms. vets in the south are together on the belief that the heartworm has altered its life cycle to mature faster than we are treating at the rate of once a month.
it is because ofthis i treat twice a month.
I don't know how you could keep from testing positive in the states we live in with mosquitoes like we have. I'm still going to stick with Hartgard this year. Ivomec doesn't work good either as a matter of fact cattlemen are rotating wormers as well. It seems the worms are building a resistance to ivomec and others too. Maybe we need a better mosquito repelent to help out.Roger
several police/sheriff departments in south Louisiana had numerous canines test positive for heartworms while on heartgard preventitive. Heartgard response was to treat the dogs and provide the agencies with 1 year supplies of their useless product.