1. If this is your first time on BYC, we suggest you start with one of these three options:
    Raising Chickens Chicken Coops Join BYC
    If you're already a member of our community, click here to login & click here to learn what's new!

Will horse wormer hurt hens when they scratch through the manure?

Discussion in 'Managing Your Flock' started by PearlGrey, Apr 12, 2016.

  1. PearlGrey

    PearlGrey Out Of The Brooder

    43
    2
    26
    Jan 20, 2014
    My hens free range all day in my horse pasture. It's partly why I have chickens - they help a lot with keeping the fly population under control!

    My vet recently told me to go back to worming the horses seasonally - before this, I've just been doing fecal egg counts instead. My hens scratch through the horse manure - will worming the horses hurt the chickens? Should I keep the girls in their house for a few days after I worm? If so, how long?

    I'll be worming with moxidectin in spring, and ivermectin/praziquantel in fall.

    I apologize if this has been asked and answered - I did a search first but couldn't find anything.
     
  2. oldhenlikesdogs

    oldhenlikesdogs Runs With Chickens Premium Member

    13,775
    1,810
    356
    Jul 16, 2015
    central Wisconsin
    I'm no expert, but I just worm them, the equines. I don't think there's anything left of the wormer to be a problem, and actually never even thought of it.
     
  3. rottlady

    rottlady Chillin' With My Peeps

    690
    80
    116
    Mar 20, 2016
    Georges Mills, NH
    I don't know about wormer pass through and chickens but I do know about wormer pass through and dogs

    If you own a herding breed of dog that is a breed susceptible to MDR-1 mutations (Australian Shepherds, Collies, Border Collies etc) you either CANNOT use Ivermectin products or you have to keep the dog away from the manure.

    Many many dogs have died because their owners did not know they had the MDR-1 mutation (there is a DNA test. dogs can be fully normal N/N, 1 gene N/M or two gene M/M) and dogs that are 1 gene or 2 gene MDR-1 mutation can die or go into comas. One owner in CT just spent over $60,000 on her Aussie after she ate sheep manure at a herding class right after they had been Ivermectin wormed

    I know this was not the question you asked but figured this would be a good place to mention this
     
  4. Mini Meat

    Mini Meat Chillin' With My Peeps

    I don't have an answer to your question but am wondering why your vet suggested seasonal worming over fecal tests?
     
  5. Folly's place

    Folly's place Overrun With Chickens

    6,633
    898
    336
    Sep 13, 2011
    My flock has been working through the horse manure for decades, with no issues. I am very careful with the wormer as far as removing any clumps that a horse spits out (some are terrific at this!) and keeping the horses away from the water tank to protect the goldfish right after worming . If any ivermectin passes through to the feces, and I haven't looked that up, it's very small amounts and no issues. I thought that the herding breed dogs were poisoned by those clumps of wormer landing on the ground directly, not fecal contamination. Mary
     
  6. rottlady

    rottlady Chillin' With My Peeps

    690
    80
    116
    Mar 20, 2016
    Georges Mills, NH
    no, a dog with the MDR-1 mutation (1 or 2 genes) can be poisoned via just the manure from a freshly wormed animal

    The Aussie example I used in my post above was eating sheep manure in a training ring from sheep wormed with Ivermectin that same week. They were wormed in their living area not the training rings Here is an article about her along with some info on the manure/ivermection problem http://www.examiner.com/article/les...herding-can-be-hazardous-to-your-dog-s-health

    My daughter has an Aussie and lives on a beef farm (horses too) and so we had him MDR-1 DNA tested when she first brought him home. Luckily he is N/N which means he has 2 normal genes and 0 MDR-1 mutant genes so she does not have to worry about him and the manure, though she is still careful with him the few days after they worm just as a precaution
     
  7. Folly's place

    Folly's place Overrun With Chickens

    6,633
    898
    336
    Sep 13, 2011
    I've never had to worry about it, not having herding breed dogs, and horse area fenced off anyway. Getting dogs at risk tested makes good sense. Mary
     
  8. PearlGrey

    PearlGrey Out Of The Brooder

    43
    2
    26
    Jan 20, 2014
    Thanks, y'all. I have border collies, and knew of dogs having been poisoned by ingesting manure from stock wormed with ivermectin. Even dogs who don't have the mutation can still overdose if they've been treated with ivermectin and then ingest more ivermectin via eating manure.

    Mini Meat - My vet said that although for years the recommendation has been for FEC, she believes there are benefits to seasonal worming. I didn't get a chance to ask her to elaborate, but I wonder if it's because FEC can sometimes miss the presence of worms, due to sampling error or type of worm (tapes, for example). Anyway, we're not going back to the every-6-weeks as we did in the bad old days - just once in spring, fall and winter.
     
  9. aart

    aart Chicken Juggler!

    30,507
    3,392
    516
    Nov 27, 2012
    SW Michigan
    My Coop
    Do you rotate wormers to avoid resistance?
     
  10. PearlGrey

    PearlGrey Out Of The Brooder

    43
    2
    26
    Jan 20, 2014
    Yes - moxidectin in spring and ivermectin/praziquantel in fall.

    Do you know if either of those will hurt my chickens when they peck through the manure after worming?[​IMG]
     

BackYard Chickens is proudly sponsored by