Ivermectin is actually what they use for heartworm medication in dogs, though at different concentration/dosages. It is supposedly bad for dogs that have collie in them due to a mutation.
From: ridecamp-owner@xxxxxxxxxxxxxxxxx on behalf of Dot Wiggins Sent: Wed 2007-11-28 13:00 To: CTH; ridecamp Subject: Re: [RC] dogs and horse wormers
Does this apply only to the moxidectin (Quest) wormers? Or the Ivermectin products as well?
Just a reminder that wormers can kill your dog no matter what breed.
My 100 pound dog almost died from horse wormer.
It was a few years ago but I thought I should post again.
My hubby wormed the horses. Sid was mad so Dave gave him a cookie to make him happier. Sid spit out the cookie, the dog grabbed it. A few hours later Buddy was panicking and blind. He got less then a teaspoon.
Rushed to the emergency clinic and 2 days in intensive care he survived. The vet said we were lucky. Had Dave not acted so quickly the outcome would have been different.
The wormer "Quest" attacks the nervous system. First symptom Blindness. Any wormer can cause a problem.
He is an old dog and it took him months to get over it.