Need help planning a schedule for feeding and deworming.

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Need help planning a schedule for feeding and deworming.

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  • How often do horses need worming
  • Horse worming schedule tennessee

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    01-19-2010, 07:43 PM
Need help planning a schedule for feeding and deworming.

Little confused about the whole Deworming thing.

I don't have a deworming schedule right now as I have only had my one mini since Aug., my Morgan/Racking gelding since December and my mini mare I got this month.

When I wormed my Mini gelding in Aug., when I got him I used Equimax.
I don't know what or how often Delilah and Winter were wormed before I got them, so I am no help there.

My horses ages and breeds are Arrow (21 months, Mini), Delilah (5 years old, Mini) and Winter (7 year old, Morgan/Racking).

All are out 24/7 We roatate fields. One is about 3 acres all together. They stay in it in the Winter with my cattle. The cattle leave in April to go out to pasture and return in November. In Febuary I will be moving my mini's to there own small field (about 1/2 an acre). My big gelding is by hisself. In April I move the horses to another field that has grass til the previous field has grown. We also have a pasture I rent from June til Aug. But I barely use it because it is so far away and I like to have my horses home to ride and mess with.

So any advice on helping set up a schedule would be great.

Now onto feeding.

I feed twice a day. 7:30-8:00 am and then again at 4:30-5:00pm

Winter gets 1 lb of soaked beet pulp, 1lb of Alfalfa pellets, and 1lb of Reliance 11 each feeding.

Arrow and Delilah get 1/2lb of soaked beet pulp, 1/2lb Alfalfa pellets, and 1/2lb of Reliance 11 each feeding, each.

Right now none of them are being worked. As soon as it warms up I will start hopefully start driving Delilah and showing Arrow (A few fun shows, nothing major). And Winter will be ridden.

So any advice/help would be great
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    01-19-2010, 08:06 PM
All of these horses should have been dewormed with an ivermectin/praziquantel or moxidectin/praziquantel (most likely ivermectin as it's harder to dose minis with moxidectin safely) in the late fal/early winter--Novemberish. Then again in the late winter/early spring. This is to treat for bots and tapeworms and to minimize the strongyles load carried over the winter.

Fecal egg counts should be performed in the middle of summer, 3 months after the spring deworming since you are most likely to use ivermectin. This will allow you to see what kind of egg shedding each horse does during the time of year when parasite loads are likely to be at their highest. Then you can use those results to plan a deworming program.

If the FEC in the summer is under 200, then deworming just spring and fall is recommended. If over 200 but under 500, you want a 3rd deworming mid-summer. And if it's over 500 then you want a 4th deworming mid-summer. The mid-summer dewormings should be based upon the egg reappearance periods for the dewormers used.

As for feeding, you are currently feeding a very high calcium diet this isn't necessarily going to cause problems but it can especially in growing horses. Both alfalfa and beet pulp are high calcium feeds. You need to look at overall balance for these horses. What type of forage are they getting besides the alfalfa pellets and beet pulp?
    01-19-2010, 08:15 PM
I have only had Winter a month and just got Delilah this month. Should I worm them with the Ivermectrin now?

They are getting free choice hay 24/7 whenever they want it as none of them are stalled.
    01-20-2010, 06:54 PM
If you just got them and you don't know about their deworming previously then yes, go ahead and give ivermectin at this point and then pick up with the deworming program in the spring. Do you spring deworming in March/April and then collect a fecal sample 3-4 months later (depending on whether you use ivermectin or moxidectin) and plan your deworming program accordingly.

The vet who does the webinar on deworming lays out the programs based upon egg count results, so watch the webinar and write down the recommendations.
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    01-20-2010, 07:23 PM
Thanks so much :)
    01-20-2010, 08:02 PM
Green Broke
Minis need very little feed. If they're not skinny and they have access to hay, I would take out the beet pulp.

How much hay are the horses getting and how often? Or do they have free choice access to a round bale?

As far as deworming, I like to rotate between ivermectin + praziquantel (equimax or zimectrin gold), moxidectin, and pyrantel promate (double dose). I follow the directions on each package, and use the free online horse management program at to keep track. After giving Ivermectin, wait 8 weeks until the next deworming. After giving Moxidectin, what 12 weeks. After Pyrantel, wait 6 weeks.

Our climate here is "mild" and "wet" all year round (when it's hot, it's wet, and it's never below freezing for more than 5-7 days a time), so I deworm year-round. If your area stays below freezing for more than a month, you may be able to give your horse's a "break" from deworming during that time.
    01-20-2010, 10:11 PM
They have 24/7 access to a round bale. I can feel Arrow's backbone through all the fur and ribs but I can't really tell how "skinny" he is..

This is the furry little boy

You can't "See" anything but you can feel it.
    01-21-2010, 09:09 AM
Green Broke
Arrow definitely looks wormy. He should put on weight nicely with just the hay and feed after he is dewormed thoroughly. Plus he is just now coming 2, so he may be going through a growth spurt. Horses of any size can get a bit ribby during a growth spurt.
    01-22-2010, 10:26 PM
Found this article and thought it might help

You can take a look at this article and see if that helps.

Worming schedules for Race Horses
    01-24-2010, 04:52 PM
Originally Posted by DaysofThunder    
You can take a look at this article and see if that helps.

Worming schedules for Race Horses
Unfortunately although this article was newly posted, it is sadly out of date. It is a repeat of the same of 40 year old recommendations and doesn't take into account that the dewormers in use have changed and that resistance of parasites to some of the commonly used dewormers is a HUGE issue. Heck, let me just post the long-winded thing without having to retype it all.

Here are the main points and you can pick out they "why's" from the longer explanation:

1. We are using different drugs now than they were 40 years ago and they are effective against a broad range of parasites so rotation is not necessary to target specific parasites except in the case of spring and fall when you want to use an ivermectin/praziquantel or moxidectin/praziquantel to target bots and tapes along with the other GI parasites.

2. Deworming every 6-8 weeks is no longer necessary because the parasite of most concern now is not the same one as when that recommendation was started 40 years ago and we are using different drugs. Many many horses only need to be dewormed twice a year--spring and fall--to control parasite populations.

3. Rotation is not truly an option any longer due to the widespread resistance issues with the commonly used drugs. The only drug currently in use with NO resistance issues is moxidectin. Fenbendazole is highly likely to be worthless in adult horse deworming programs and pyrantel is moderately likely to be of little use both due to the development of resistant strongyles to these drugs in many areas of the US.

4. We need to focus on deworming appropriately and limiting the number of times we deworm yearly to help slow the development of resistance in parasites to the drugs that we have for deworming. 2-4 dewormings a year is the new recommendation and not deworming during the time of year when envirnmental conditions are not conducive to parasite reinfection. This means not deworming during the summer months in the southern US and in the winter in the northern US.

The newest recommendations as of June 2009:

For 40 years now, veterinarians have recommended that horses be dewormed every 8 weeks all year round and rotation of dewormers has been recommended for nearly that long. This is considered by many vets and horse owners to be “the recipe” for adequate and appropriate deworming of horses. However when you look at the research that has been done in the last 15 years you really have to question this practice. “’The recipe’ no longer represents an acceptable program for strongyle control” according to Dr. Craig R. Reinemayer, DVM, PhD of East Tennessee Clinical Research, Inc during a webinar presented via This means that deworming recommendations for adult horses need to be reconsidered because strongyles are the only significant nematode pathogen of mature horses. Continuing to use the same old deworming program will likely lead to heavily parasitized horses and further drug resistance. Instead, each horse and each situation should be evaluated to determine the reinfection rates and an appropriate deworming program for the individual.

It's now known that all adult horses living in the same situation do not necessarily need to be dewormed on the same schedule. 50% of horses in a herd will control parasite loads on their own due to natural resistance. Only about 20-30% of horses carry heavy parasite loads.
Thus each horse should be dewormed based upon an understanding of his own personal resistance to parasites. The best recommendation is now 2-4 dewormings a year based upon knowing which horses carry lots of parasites and which tend to carry little parasite load.

Rotational deworming is no longer an adequate or appropriate deworming program for adult horses. There are too many issues with strongyles developing resistance to 2 of the 4 most commonly used dewormers on the market---fenbendazole (more than 90% of areas tested have resistant strongyles) and pyrantel (around 1/2 of areas tested have strongyles resistant to this drug). And resistance is starting to be seen in strongyles to ivermectin---1st study showing it was done in KY in the last couple of years.

All adult horses in the continental US/Canada should be dewormed spring and fall with ivermectin/praziquantel or moxidectin/praziquantel. Other than those 2 standard dewormings, the rest of the deworming program should be based upon location and the horse's own resistance to parasites. The new recommendation is 2-4 dewormings per year based upon fecal egg counts used to determine the normal amount of egg shedding each horse does during the time of year when the weather in your area is most conducive to strongyle larva development and environmental survival. In the northern states in the US and in Canada, this means running a fecal egg count in the middle of summer (3 months after spring dosing if you used ivermectin or 4 months after spring dosing if you used ivermectin). In the southern US and Mexico you would be looking at testing in the middle of the winter (same time after spring deworming as listed above). Then based upon the number of eggs per gram of feces you can determine if you need more than the spring/fall dewormings and if so if you need 1 or 2 more dosings.

In the northern US and Canada, deworming should be discontinued during the winter months because the environmental conditions are not conducive to reinfection---that time of year has been proven to have extremely low reinfection rates. In the southern US and Mexico the opposit is true....deworming can be discontinued during the heat of summer because temps over 85 degrees lead to the infective strongyle larva dying quickly in the environment so the reinfection rates are lowest then.

For more detailed information check out the deworming webinar that was aired via The Horse magazine's website in April. Be prepared to sit for a while because it is an hour long presentation, but it's well worth the time. The veterinarian gives you all the information on strongyles and deworming in adult horses that you've always wanted to know and then some. It is a wonderful lecture. (And have plenty of paper and a pen.)…
(Craig R. Reinemeyer, DVM PhD --parasitologist)

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