Chickens under 2 months dropping like flys,no noticeable symptoms

[EggWalrus]

Hmmm...
Giardiasis
Giardiasis is an incredibly rare parasite and it is usually not problematic unless it overruns the immune system.

Chickens normally catch this parasite through pecking at infected poop (dog, cat etc.) and symptoms include brown watery diarrhea, weight loss and dehydration.

If you suspect your chickens have Giardiasis, visit your local vet and they will prescribe your chickens antibiotics.

Note: Humans can also catch Giardia, so good sanitation and hygiene practices will help to prevent transmission.
Found this on the happychickencoop site. May clear up how your chicks got it at least.

I think I had it when I was a kid from not boiling water long enough when camping. I think they used to call it Beaver Fever back then. I was sicker than a dog with it coming out both ends, I just knew I was gonna die. It had me shaking worse than a hound dog pooping pine cones!

 

[Kiki]

I did open one but didn't really know what to look for. I knew there'd 've red blood dots for cocci and didn't see any of that. It looked healthy and like all the chickens insides we've butchered to eat, but again I wasn't sure what to look for. There are close to a dozen cats on the property and the chickens free range,it would be next to impossible to keep them away. The sick 2 are quarantined however.

This is not true. There does not have to be blood for it to be coccidiosis.

 

[Kiki]

I highly recommend Corid.

 

[staceyj]

I think I had it when I was a kid from not boiling water long enough when camping. I think they used to call it Beaver Fever back then. I was sicker than a dog with it coming out both ends, I just knew I was gonna die. It had me shaking worse than a hound dog pooping pine cones!

Ouch!

 

[Elsveta641]

Is there a stream or creek that passes through your property that also runs by or through the neighboring farm?

There's on through there's that doesn't go through mine (above ground anyways). Their cows like to wander over and poop in my yard occasionally and they have a pond about 50 yards from my barn.But my birds don't go don't go over there. That's about it water wise

 

[staceyj]

I highly recommend Corid.

I agree and the op said she might have it on hand.
And it doesn’t hurt.

 

[Elsveta641]

This is not true. There does not have to be blood for it to be coccidiosis.

I know there does not have to be for it to be cocci. But it was the only internal symptom of illness I could remember to check for. I was basically just opening the bird to see if anything at all looked unusual compared to what I usually saw.

 

[Kiki]

I know there does not have to be for it to be cocci. But it was the only internal symptom of illness I could remember to check for. I was basically just opening the bird to see if anything at all looked unusual compared to what I usually saw.

Ok good. Coccidiosis signs would have been inside the intestines.

 

[Eggcessive]

Getting some fresh droppings checked for a fecal test for parasites, or a necropsy done by the state vet to get a diagnosis would be the best things to do to get answers.

 

[Kiki]

Iowa.

https://vetmed.iastate.edu/vdl/diagnostic-tests/