Sue,
> My understanding is that what you say is true; collies cannot tolerate
heartworm preventative medication. However, other dogs do tolerate the
medication without >>incidence and if not for the medication, would die of
heart worm.
>Now that the subject has been introduced, what IS given to collies for
heart worm prevention?
Some collies, not all, have a mutation called MDR-1 mutation, and dogs who
are affected are sensitive to multiple drugs and it's not just collies:
http://www.vetmed.wsu.edu/depts-vcpl/breeds.aspx
http://www.vetmed.wsu.edu/depts-vcpl/drugs.aspx
this doesn't mean they cannot be given the regular heartworm meds, but they
have to be given at a safe level, the heartworm meds sold by vets like
Heartgard, have only 272 mcg of ivermectin for a 50 to 100 lbs dog, Laura
posted she gives her large dogs 10.000 mcg (1 ml of the 1 % injectable
ivermectin), this is safe for dogs that do not have the MDR1 mutation, but
it would be a deadly dose for a dog that is affected by the MDR1 mutation.
> Years ago, collies were the number one breed of dog to have but in the
last 30 years (???) they seem to have disappeared. Border collies are
fairly common but I haven't seen a `regular' collie (as in Lassie) for eons.
> Any thoughts on this?
oh, they are there, just not as popular as they used to be, I am thinking
about getting a working bred rough collie sometimes in the future, I know
somebody who breeds them and I love to see that at least a few breeders are
preserving the old-time collie that can be useful as a farmdog.
Marlene, Nevada, USA
www.Anatolians-of-Zaltana.com
Blog: http://zaltanaanatolians.blogspot.com/ and
http://zaltanachickens.blogspot.com/
CHICKENS-101@yahoogroups.com
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