worming lambs question

[Bury the Trash]

https://www.youtube.com/watch?time_continue=37&v=JjOBua-cPpw


nb. the bit mentioned about resistant worms mating with susceptible worms with the offspring then being susceptible

 

[Bury the Trash]

todays new word 'refugia'
https://beeflambnz.com/knowledge-hub/PDF/worms-refugia-tool-delay-drench-resistance

 

[rancher]

Lambs with scoury tails here doesn't reflect worm burden, we've tested individual lambs here many times and clean lambs can have high counts and dirty lambs can have low burdens.
I wouldn't agree with dosing based on dirty backsides for that reason

 

[Bury the Trash]

Its them clean and doing well lambs with high counts you want in your breeding lines then !
Course there is other things that can cause dirty rears.

 

[neilo]

Its them clean and doing well lambs with high counts you want in your breeding lines then !
Course there is other things that can cause dirty rears.

As long as the whole flock is like that. Those lambs with high counts are contributing most to pasture contamination.

 

[Bury the Trash]

Well ideally all breeders will be selecting for resistance and resilience .

 

[cheviot53]

I might try worming the dirty lambs in a small lot just as an experiment.

Years ago when I tried the organic way, this is what they wanted me to do but all that happened was that next week I dosed different dirty lambs and so on

 

[Man_in_black]

Its them clean and doing well lambs with high counts you want in your breeding lines then !
Course there is other things that can cause dirty rears.

 

[Bury the Trash]

??

what good is it breeding sheep that cant even cope with a low worm burden ?

 

[Bury the Trash]

That depends how soon after you move them... You don't want to drench the lot then move immediately to clean grazing as the ones that survive drench are then dropped onto fresh grass to start cycle. You need to dilute any resistant (surviving) worms with non resistant (back on dirty fire 24 hours or don't drench 10% of the group).

Not long enough ,
.. plan to allow them to stay in 'dirty' field for 4 to 5 days or so before moving .

 

[Bury the Trash]

www.wormboss.com.au/worms/roundworms/roundworm-life-cycle.php

cut and paste ...see paragraph...

'
The time for eggs to pass from the sheep after an effective drench
An effective drench will take some hours to kill all the worms present and therefore stop further egg-laying by female worms. Some viable worm eggs will already be in the sheep’s gut at the time of drenching and these won’t be affected by most drenches. It will take 3–4 days after an effective drench for the gut contents to carry most of the worm eggs out of the sheep. Bear this in mind if you wish to move sheep to a paddock that is to be kept uncontaminated.'

 

[Bury the Trash]

its important to remember as well that before buying in anything it would be useful to know what the drench resistance situation was like on that placewhere they are coming from and thats a bit of a difficult one although some will have info on their flock in that respect..status , they could be in the minority im guessing....

 

[Man_in_black]

??

what good is it breeding sheep that cant even cope with a low worm burden ?

Sorry @Bury the Trash I've quoted the wrong bit there!!

 

[neilo]

its important to remember as well that before buying in anything it would be useful to know what the drench resistance situation was like on that placewhere they are coming from and thats a bit of a difficult one although some will have info on their flock in that respect..status , they could be in the minority im guessing....

Good luck finding a vendor that tells you they have triple resistance on their farm.

I treat everything that comes on as if they have just that, with nothing getting here without at least a Zolvix drench and 24-48 hours in a shed.

 

[Bury the Trash]

Good luck finding a vendor that tells you they have triple resistance on their farm.

I treat everything that comes on as if they have just that, with nothing getting here without at least a Zolvix drench and 24-48 hours in a shed.

quarantine would want to be a bit longer than that surely makes you wonder how many actually do at all.

 

[neilo]

quarantine would want to be a bit longer than that surely makes you wonder how many actually do at all.

I did say ‘at least’. Usually several days in a shed, but then that’s only for worms. Only bring on the odd few normally, and all Mv accredited, etc anyway.

HCC did a study of 47 Welsh farms a couple of years ago, looking for levels of wormer resistance across the country. I would suggest that it was skewed before the start, as I know that several of the participants had already known they had triple resistance before volunteering, so hardly a random snapshot.
As part of that we had a questionnaire on current practices, with one question being on quarantine procedures. The vet told me that, even amongst that ‘loaded’ sample, a lot were doing nothing, and a couple thought they were covering themselves by using a white drench on arrival.