Puffy Crops

[apolishluck]

Hello! Ive posted a couple times before about my chicks having Cocci. They have all been treated and are all doing well except for this. Ive noticed that 3 out of 4 of my 2 month old chicks have bubbled or puffed crops. Ive managed to try and smell their breath and none are smelly so i dont really know if its sour crop. Any ideas as to why this happened? Is it over eating or eating too much?
They havent been in any grassy areas to eat grass and are isolated from the others. All are active and interacting fine. Does this just digest after a few days? I am on day 2 of this. None seem to have gotten bigger though i fed them this morning, though none have really gone down significantly enough for me to notice.

Any clues? Should i be worried?

 

[Feathers n Fur]

if the crop is hard it could be impacted. if it's soft it could be sour crop. if soft try acv in the water, offer plain yogut with acidopholis for digestive aide.

 

[apolishluck]

acv? and do i just substitute their regular food for the time being or feed it to them like its a treat every so often? They are definitely soft, none that are hard that i can tell from. Appreciate the advice! i was freaking out a bit hahaha