Pullet keeping neck puffed up?!

[azmahhhhhh]

Hi,
So I started noticing two pullets keeping their neck puffed at all times. Still running around, drinking, eating etc. But then, stays puffed and when I leave, I see it acting more lazy.

No discharge from the nose/eyes, vent area looks clean, no weird poop.

What am I missing?!

Thank you!

 

[Eggcessive]

How old are they? I would suspect coccidiosis, and I would get some Corid or amprollium from your feed store. Treat the whole flock with 2 tsp of the liquid or 1.5 tsp of the powder per gallon of water, as their only source for 5 days. For the 2 lethargic chicks, give each one 1/4 tsp of the undiluted Corid as well once a day. Make sure they drink the treated water. What do their poops look like?

 

[azmahhhhhh]

The poops are the normal brown, no blood, no diarrhea.

I gave them corid as you suggested.

Wondering if it could be sour crop? I took away the food/water out of the enclosure and will feel their crop tomorrow!

Only 3 out of 30 seem to be affected, so I'm not sure. They're about 12 weeks old!