Spectam scout halt and electrolytes. The lambs need the patasium and extra fluids.. I use lamb and Kid restart. In my lambing kit along with goat and sheep CMPK powder. Both made by tech mix. The company that makes bluelyte. The restart product has extra vits, minerals, lactic acid , energy ECT. Tech mixs , products ,are the best on the market, IMO.
All we used in the animal research company I used to work for. We tried them all. Tech mix products ,were far superior in our trials. These were immune compromised cloned biogenetic calves. Around 75k per calf. No expense was saved to keep them alive. And scours was always imminent in these.
And yes, I have seen new born calves and lambs ,die from ecoli, before they even scour.
The newborn die from the toxins, the bacteria produce. Which is what causes the scours.
The body is trying to purge the toxins, via the scours.
Do not try to stop the scours with rememdys lot will recommend. You treat with antibiotics,which you did. That knocks the bacerial level down , and with electrolytes. That has more easily digested energy than milk, and helps replenish and balance the balance of the body.
If these were my ewes, and lamb born from now on, would be given a dose of the spectrum, as soon as born.
Common here.
Used to be a very effective vaccine for this, but the one lab ,making it ,did not have the experimental use license ,renewed by FDA. And eventually lab was sold . New pharma, has no interest in "minor species" ,so that avenue is out.
I have had great results , with extra label use of a cattle vaēcine.
Good luck , and recovery is gaurded, once affected this bad.