Autumn deworming update for EVERY adult horse

It’s recommended to treat EVERY adult horse in late Autumn with an ivermectin-based dewormer.

The good news is, Kelato has not one BUT two dewormers in our product range to provide year-round worm control for your horse!

Whilst the cooler weather means strongyle egg production decreases, this is the best time to target other types of parasites such as bot fly larvae and tapeworm. Kelato’s Evolve contains Ivermectin and Praziquantel and is the ideal broad-spectrum dewormer and boticide for Autumn. Consistently low egg shedding horses only need to be treated once a year and Autumn is the time to do it!

Evolve is effective against:

  • Large strongyles
  • Small strongyles
  • Ascarids
  • Pinworms
  • Tapeworms
  • Bots
  • Neck threadworms
  • Intestinal threadworms
  • Lungworms
  • Hairworms
  • Large mouthed stomach worms

Evolve also controls skin lesions caused by Habronema and Draschia spp., cutaneous larvae (summer sores), and Onchocerca spp., microfilariae (cutaneous onchocerciasis).

Evolve Broad Spectrum Wormer

But, what about Spring? Rapidly growing pasture and warm, moist conditions in Spring provide an ideal environment for strongyles to start laying eggs. Kelato’s Revolve, containing Oxfendazole and Morantel Tartrate, provides the ideal deworming solution for Spring.

Revolve is effective against:

  • Larval stages of S.vulgaris
  • Small strongyles
  • Ascarids (roundworms)
  • Pinworms
  • Tapeworms

Below is some handy information on current parasite control recommendations. If you would like more technical information please get in touch with our Technical and Product Coordinator at

Deworming recommendations have changed A LOT over the past few years. We all used to follow an interval-based approach of deworming our horses every six to eight weeks or, for some, timing it with when the farrier came out. The problem with this approach is overuse of anthelmintic (deworming) drugs has led to widespread resistance. This means the drugs we use to kill the worms in our horses are no longer very effective! The other MAJOR problem is it looks like there won’t be any new drugs developed in the near future, if ever. It’s quite scary to think about resistant worms continuing to reproduce and create more and more super worms!

So, what do we do now!? 

It now recognised that 20% of horses carry 80% of the worm burden. Best deworming practice relies on the results of faecal egg counts (FECs) to identify the shedding category of your horse. Basically, you examine the horse’s manure under a microscope and count how many eggs there are and determine what type of a shedder your horse is per the table below.


Eggs per gram (epg) Level of shedding
<200 Low shedder
200-500 Moderate shedder
>500 High shedder


A low shedder has a good natural immunity to parasites and therefore doesn’t require frequent treatment, whereas a high shedder may require more treatments to keep their worm burden under control.

There are a multitude of factors that determine the period between deworming treatments. Current best practice for deworming horses is to perform FECs prior to treatment of each individual horse to determine worm burden and whether the individual needs to be treated.

The concept behind FECs is to slow down worm resistance to deworming drugs. Tailored deworming programmes need to be developed for each individual property. Performing FECs will also help you to identify whether there is a resistance problem on your farm. It is best to minimise the number of deworming treatments each year, only treat horses with a moderate to high shedding category and implement good pasture management and husbandry practices to reduce the risk of parasite transmission.

It is important to target parasites when environmental conditions are favourable for their survival on pasture. That is, when conditions are warm and moist (i.e. autumn and spring). Normally, it isn’t recommended to treat horses during winter when there have been significant periods of frost or during summer when it is very hot and dry, as the worm larvae aren’t viable during these periods. You would only worm during this time if the horse returned a moderate to high FEC.

Remember, we can’t just rely on deworming drugs to control gastrointestinal parasites in our horses. It is essential to implement good management practices. Here are some recommendations to help slow anthelmintic resistance:

  • Pick up manure at least twice a week.
  • Avoid overcrowding (maintain low stocking densities in paddocks).
  • Avoid feeding horses off the ground (e.g. use feed bins).
  • Don’t drench in very hot or very cold weather.
  • Correctly dose horse according to weight.
  • Cross graze with cattle or sheep.
  • Quarantine and FEC newcomers on property.

Want to find out more? Head over to EVOLVE and REVOLVE pages, get in touch on 1800 KELATO or email .