DEAR DR. FOX: If you remember, I contacted you about my dog having shaky head syndrome. The cause was either milbemycin or lufenuron. The milbemycin seemed most likely due to neurotoxicity, but all heartworm meds are neurotoxic, correct?
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What can I give her for heartworm prevention? I am using Wondercide for fleas, ticks and mosquitos. Rosie has gone episode-free for almost two weeks. -- L.B., Atalla, Alabama
DEAR L.B.: I am glad that your little pug dog, Rosie, is recovering from the neurotoxicity of the anti-heartworm medication. I have the impression that some veterinarians are misdiagnosing neurological effects of these parasiticides for other neurological conditions rather than asking their clients if such medications are being used and advising immediately stopping them. Some dogs are extremely susceptible to developing neurological issues even after some months or years without any evident adverse consequences from such anti-parasite drugs.
I have looked at the ingredients of Wondercide, and they are safe herbal insect repellants that I would advise you spray on your dog before going out, especially around the ears and top of the head. Putting a light dog coat on may give additional protection from the biting mosquitoes that transmit the heartworm parasite.
Various animals, notably bears and cats, will rub against certain plants to anoint themselves with botanicals that repel biting insects: cedar resin for bears and catnip and catmint for cats.
I use the spray and supplements from Earth Animal, developed by veterinarian Dr. Bob Goldstein, on my dog who suddenly had a seizure after several years of being given Heart Guard anti-heartworm medication. I do not think these herbal extracts should be in dogs’ and cats’ collars, as it may interfere with their sense of smell and spatial orientation.
DOGS CAN SMELL OUR STRESS
Human breath odor can warn trained service dogs of oncoming flashbacks in people who have PTSD, according to a study published in Frontiers in Allergy, making it possible to stop the episodes earlier and more effectively. PTSD service dogs already predict episodes from cues like fist-clenching or elevated respiration and heart rates, and the successful dogs in the study seem to respond to separate olfactory biomarkers, one tied to human participants' self-reported shame and another to self-reported anxiety, says researcher Laura Kiiroja. (See: Kiiroja L., Stewart S.H. and Gadbois S. (2024), Can scent-detection dogs detect the stress associated with trauma cue exposure in people with trauma histories? A proof-of-concept study. Frontiers in Allergy, March 28, 2024)
I remember as a child, an old woman shaking her head as a man passed by, muttering, “He don’t smell right to me.” We seem to have as little common sense these days as our olfactory sense, compared to dogs! It is well known that dogs can sense when a diabetic needs insulin, when someone has cancer, and when someone is infected with the virus that causes COVID-19.
(Send all mail to animaldocfox@gmail.com or to Dr. Michael Fox in care of Andrews McMeel Syndication, 1130 Walnut St., Kansas City, MO 64106. The volume of mail received prohibits personal replies, but questions and comments of general interest will be discussed in future columns.
Visit Dr. Fox’s website at DrFoxOneHealth.com.)