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Has anyone here had a problem with pinworms (in their horse)? Most of our 
horses are in separate fields, but they're all on the same deworming 
program. Only one horse is having this problem,  Since this is the one I 
ride, I figure she picked some up somewhere we rode that the other horses 
haven't been exposed to. Ivermectin doesn't seem to work, doesn't slow them 
down for even 1 day.
I tried pyrantel pamoate, and that works for 3 weeks. After 3 cycles of this 
I stopped and she had relief for 6 weeks. I realize she is reinfecting 
herself, but moving her to another field and leaving hers empty is not an 
option. I can't find a whole lot of detailed info on pinworms except that 
they are mainly considered a nuisance. If I put her on a daily wormer for 6 
months (since their life cycle is 5 months) does anybody have a clue how 
long the eggs would remain viable in her pasture? Or would it do just as 
much good to use the oral every 3 weeks? Some combination of the above?
And, yes it is pinworms, not an allergy itch. I see them & their yellow gunk 
when she is rubbing.

If you want to email off list use
mitts@xxxxxxxxxxxxxxx

Thanks
Nancy Mitts

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