I had the A&M vet write it down for me. He wouldn't prescribe the Ivermectin. But since I told him I was going to use it he went in the back and did some math, and gave me the dosage. Maybe the Aggie isn't that good at math.

Wouldn't be the first one.

I use Ivermectin for livestock, but you absolutely MUST know what you are doing... the wrong dosage or the wrong breed and it can be deadly.

Perhaps Aggies who are weak in math choose to become veterinarians? But I'm betting he had a 4.0 GPA, or he likely wouldn't have gotten admitted into vet school in the first place.

My husband's Aggie brother, mechanical engineering 1976, isn't very good at math either. He's still trying to figure out if he earned $4 million or $6 million in 2010, or perhaps somewhere in between.

But regarding the OP's question.....there is a wide effective dosage range with ivermectin in dogs. Very low doses will kill heartworm migrating larvae and very high doses will kill Demodectic mange mites. Fortunately, even high doses are well tollerated by most dogs, but not in collies or collie mixes, and perhaps certain other rare individuals. This wide margin of safety is a fortunate thing when THF members get the local feed store confused with the town's veterinary clinic. Also, most of the posters here aren't math whizzes either and couldn't measure a cc of medication if you gave them a lab pipette, a magnifying glass, and a hot female tech showing them how.

So, if one vet says .01 cc and another vet says .1 cc, both are right; heartworm prevention will be achieved either way. But the more pressing question is: can you, the dogowner, follow directions? YOU probably can, but what about the next guy? Thus the reluctance, as well as the liability, of recommending home off-label dosing of medications.

So, since you boys are all math whizzes, I'll offer up a dosing schedule that even knuckle draggers can follow:

Ivomec cattle injectable, or similar in 50 cc bottles,

Small dog...0.1 cc monthly
Medium dog...0.2 cc monthly
Large dog...0.3 cc monthly.

This message will now self-destruct and I deny any knowledge concerning same.

Perhaps Aggies who are weak in math choose to become veterinarians? But I'm betting he had a 4.0 GPA, or he likely wouldn't have gotten admitted into vet school in the first place.

My husband's Aggie brother, mechanical engineering 1976, isn't very good at math either. He's still trying to figure out if he earned $4 million or $6 million in 2010, or perhaps somewhere in between.

But regarding the OP's question.....there is a wide effective dosage range with ivermectin in dogs. Very low doses will kill heartworm migrating larvae and very high doses will kill Demodectic mange mites. Fortunately, even high doses are well tollerated by most dogs, but not in collies or collie mixes, and perhaps certain other rare individuals. This wide margin of safety is a fortunate thing when THF members get the local feed store confused with the town's veterinary clinic. Also, most of the posters here aren't math whizzes either and couldn't measure a cc of medication if you gave them a lab pipette, a magnifying glass, and a hot female tech showing them how.

So, if one vet says .01 cc and another vet says .1 cc, both are right; heartworm prevention will be achieved either way. But the more pressing question is: can you, the dogowner, follow directions? YOU probably can, but what about the next guy? Thus the reluctance, as well as the liability, of recommending home off-label dosing of medications.

So, since you boys are all math whizzes, I'll offer up a dosing schedule that even knuckle draggers can follow:

Ivomec cattle injectable, or similar in 50 cc bottles,

Small dog...0.1 cc monthly
Medium dog...0.2 cc monthly
Large dog...0.3 cc monthly.

This message will now self-destruct and I deny any knowledge concerning same.