Worm test results on store lambs

Try the clear dose, and test again in a fortnight, Or a yellow dose and test in a week 900 is way too much to be left and if the white didn't kill those 900 it was unlikey to kill them the next time either. You'll only make them more resistant. Levafast diamond might be a good dose as it'll kill the rumen fluke as well, you can test again in a week after that too,

I wouldn't know much about coccidia, but I'd expect six mth old lambs to be immune, however with such a high worm infection their immunity might have been compromised ,

As you know we do FECs here for nieghbours and this is the worst year for resistance in samples brought here we've ever had

We dose here based on FECs and after every dose we test again.

I would be interested to hear what your vet advises

You only got a 71% kill, There's a resistance problem if the kill is below 95%

Intresting that you started this thread! I'm at the exact same thing currently, dung sampled the ewe lambs Im keeping on last week and they had a count of 2000. It was over 11 weeks since they were dosed last with oramec which is a ivermectin and not a moxidectin iirc.

Dosed them with a white dose to see if its still working. Have only used a white dose as a first dose for nemo for a long time now so hoping for a good result. I think the last time I used it for a late season wormer a member here done the dung sample for me, I was meant to start at it meself but never did. I'm sorry now I didn't start at it. Il post the results when I get them back.

You would certainly think so, Id be hoping that the 3 classes of wormer would be working here. Closed flock and any ram bought in gets zolvix and try to use each class just once in the year.

Does anyone here give zolvix at any stage during the year? Seems to be a lot of conflicting advice about it.

No, it will be over a week until I sample again as it's two weeks after a white dose to resample I think. I'd be hoping there isn't resistance but that's probably wishfull thinking.

Id be the same here and never dose ewes for worms so hopefully that's helping aswell. On the zolvix, I've read that it should be used as a mid to late season drench to clear out lambs, sort of like what ye are doing and it stand to reason thinking about it but then the place where I buy some of the womers was saying to not be using it as it would only accelerate resistance.

Is the moxidectin/cydectin drench as bad for promoting resistance as the cydectin injection? For some reason I thought that because cydectin is persistent and it stays killing worms and then as it's effectiveness wears off its promotes resistance. I could be imagining that though.

What dose did they use?

Have been through all that .

FEC lambs here during the year and also ewes for fluke .Rarely if ever dose an adult sheep for worms and fluke dosing is only done on test results.

Had a serious worm (resistance )issue here a few years ago .Blamed it on doing ewes for fluke with Closamectin for a few years .

Started getting an issue with dose resistance in lambs about 8/10 years ago .Usual thing of poor thrive esp. in September/October .Started doing FEC regularly and found that ivermectin drenches were very ineffective .Killing 90% plus but no residual effect whatsoever .Egg count could be back up to 500/1000 within 3 weeks of dosing .

Got PMs done and a real chicken and egg job .Low cobalt and huge worm burden which could either be lambs were low in cobalt and so more likely to succumb to worm pressure or high worm burden was causing low cobalt levels .

Used Zolvix once on them after weaning .It didn't seem to do much for that crop of lambs thrive wise but did clear worm burden totally .Went back to white/yellow/clear following year and touch wood no issues since .

Get normal worm issues but dose and 10/14 day retest shows its working .Was recommended to use Gen 4 dose at weaning if problem persisted/returned but all good so far for the last few years .

Advice I got was to change my nematodirus drench each year from white to yellow to clear and then alternate the 3 classes each year eg on the lines of;

Year 1 yellow clear white yellow

Year 2 white yellow clear white

Year 3 clear white yellow clear

plus only dose on FEC results and to check dose if working or not with after dosing test .

Local vet does testing with result in a few hours so very handy .

Replied on the phone and reading back over it only now .

Have very dry land here .Have tested ewes for fluke for a good number of years and have yet to get a positive result for liver fluke .An odd year shows up a small amount of rumen fluke .

Waste of time and money routinely dosing ewes for fluke .

The dosing recommendation came not from my own vet but a vet involved with one of the major pharma companies .Met him a few years ago on a farm and he said only fluke dose sheep that need it .Have phoned him a few times for advice re worm issues and he was the one that gave me the advice about the Zolvix and alternating the dosing regime etc etc .