Help! I have a sick Chicken!

[The Rusty Nichols]

Please help! I recently homed 5 chickens (2, 2 year old Isa Brown, and 3, 3 year old Leghorns) and integrated them into my flock. We had 14 "teenage" birds that aren't laying yet (10 Isa Brown, 2 Rhode Island Red, and 2 Americauna). We've had them for about 2 weeks now and yesterday I started noticing one of the leghorns was having diarrhea. Today I watched her throw up water. Now another one of the leghorns is starting to show signs of a messy vent. Any ideas? Today I separated the initial sick bird, wondering if I should isolate both? I kept all 5 of the new birds separated within the coop and the run until a few days ago. I'm also noticing a lot of grit in the sick bird's poop. Please help! I'm really worried that my whole flock could go down! Thanks in advance!

EDIT: I just went out and checked them again and all 3 of the leghorns have the diarrhea. I've isolated all 3 of them. The 2 Isa Brown hens that I got with the leghorns are fine, and all of my original flock seem to be fine as well.

 

[Wyorp Rock]

So the "new" birds are the ones that are sick?

Can you take a stool sampling to your vet for testing?

If it's all the new birds and you've had them for a few weeks, my first thought would be Coccidiosis. Do you have any Corid on hand?

"Throwing Up" water is usually associated with crop issues - check their crops first thing in the morning to see if they have emptied.

 

[The Rusty Nichols]

It's 3 of the 5 new birds that are sick. The 3 leghorns are sick but the 2 Isa Browns are doing fine. They all came from the same place, and have lived together for years.

 

[Wyorp Rock]

I understand. Even though they have been living together for years, they are new to your property. Coccidia is a protozoa that lives in the soil and in chicken poop. If I remember correctly, there are 9 strains that chickens can get. They may not be be resistant to what they have encountered in their new home.

Take some stool samples to your vet for testing - this will confirm whether there is an overload of worms or coccidiosis.