Found a dead chicken in the coop

[Chickety Charcoal]

This morning when I fed the chickens one of them stayed up on the roost and wouldn't come down. When I came home tonight I found her dead on the coop floor. She was a year old and showed no signs the day before of anything wrong. After inspection I found some blood in her mouth and her vent looked red, but I felt no mass near it (egg-bound etc). I couldn't find any other signs of problems.

I had treated them with Wazine a few days ago after I found worms in another hens poop. They have since been eating and behaving as usual. Egg-laying has decreased in the past few days.

What went wrong? What can I do to prevent this from happening to the other birds?

 

[klmclain1]

Wazine ONLY kills roundworms. Are you certain that the worms you saw were roundworms? If not, then I'd worm with Valbazen right away. It's a broad-spectrum wormer.

 

[dawg53]

The roundworms were flushed out after you wormed them with the wazine, that's why you saw them. The bird that died couldve died from toxic worm overload. This why it's best to use a slow killing wormer such as valbazen.

 

[Chickety Charcoal]

So even though I gave the wazine less than 10 days ago, I should give the valbazen now? Didn't know of that would be overload for them.