I'm not saying your ducks didn't die from e coli infections.
I'm saying you didn't have the two bags of feed tested so you can't make the claim it was the feed. That is wrong.
Just say your birds died from e coli. That sucks big time. I'm just pointing out that this:
Looks like an issue that could spread e coli like no body's business.
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That is a small space for 50 plus birds.
I'm pointing out that all birds have e coli in their tract.
I'm pointing out that e coli doesn't kill all birds so quickly...that there had to have been something else going on.
You also mention in your other thread that ONLY ducks died. No chickens.