I'm not inclined to want to constantly test and treat for worms and other parasites. To tell the truth, I think it is somewhat of a money maker for the veterinarians. My vet wanted to give my boy antibiotics because she noticed that he had a small ( 1/8") wound near his nose when he was in getting neutered. I declined - it wasn't infected and healed fine. Does she think I should run him to the vet for antibiotics for every little nick and cut? Would she personally take an antibiotic if she had a small scrape? He carries fallen branches from trees around for entertainment, he's bound to get poked occasionally. I hate having to try and figure out if the vets' medical suggestions are necessary or just a nice boost in their bill amount.
It is just food for thought on my part that maybe we shouldn't be in such a hurry to sanitize and de-parasatize our environments. I think we'll be hearing lots more about these studies in regards to human health. I just thought it might be worth considering the same effects on our dog's health. Of course the dogs themselves make sure they are exposed to plenty of dirt every time they go outside and head straight for the dirtiest, smelliest stuff to investigate, so few deal with a lack of exposure. So the hygiene hypothesis may not be applicable to dogs but maybe the "old friends" could be. As far as all the health issues worms cause I think the point is that it isn't uncommon for the adults to carry a small parasite load that causes them no problem. Sure puppies can be harmed but many/most adult dogs aren't - so is prophylactic worming really so desirable?
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