Have a chicken who walks around like it's equilibrium is out of whack

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it eat and drinks, just has a hard time keeping its balance.
Another chick a month earlier was doing the same thing, and thought maybe best related stress, but it died, and was wondering if anyone else has experienced any of there feathered friends with these symptoms and maybe know a cure before this bird gets to unhealthy to survive.
Thanks in advance for any ideas
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[Kiki]

Welcome to BYC.
First thing that comes to mind would be wry neck...next would be Coccidiosis.
How old/young are your birds?
And..what do you feed them, include the brand name if possible and a list of any and all treats.

 

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4-5 months old

 

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Welcome to BYC.
First thing that comes to mind would be wry neck...next would be Coccidiosis.
How old/young are your birds?
And..what do you feed them, include the brand name if possible and a list of any and all treats.

Chicken feed from tractor supply, they eat bugs in the yard and some cracked corn, also around my house I spray permethrin to keep bugs crawling in house, they may have eaten some of the dead bugs, not sure. A vet didn't permethrin was a problem, but I was thinking if they eat bugs that were poisoned p, maybe that could be hurting them

 

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Chicken feed from tractor supply, they eat bugs in the yard and some cracked corn, also around my house I spray permethrin to keep bugs crawling in house, they may have eaten some of the dead bugs, not sure. A vet didn't permethrin was a problem, but I was thinking if they eat bugs that were poisoned p, maybe that could be hurting them

Dumor

Chicken feed from tractor supply, they eat bugs in the yard and some cracked corn, also around my house I spray permethrin to keep bugs crawling in house, they may have eaten some of the dead bugs, not sure. A vet didn't permethrin was a problem, but I was thinking if they eat bugs that were poisoned p, maybe that could be hurting them

Dumor chicken feed

 

[Kiki]

Sorry for all the questions but I have one more before I tell you what I think.
Can you post a few pictures of her.

 

[Kiki]

Permethrin is approved for poultry....I would not think that is the problem.
...not sure how to word what I am about to say.....I don't think it "lasts long" after it is sprayed.

 

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Chicken closest

 

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Two more photos

 

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Permethrin is approved for poultry....I would not think that is the problem.
...not sure how to word what I am about to say.....I don't think it "lasts long" after it is sprayed.

I was thinking the spray is ok but the bugs that were killed by it may have poisoned them, just a thought