What’s wrong with this chick?

[Bokbokbokbecky]

These 2 chicks are the same age. The yellow one is developing normally, th grey one seems stunted. She is not walking much, I have to physically feed and drink her. Today I separated her from the rest of the chicks (she’s pictured in her hospital box) to try to get her to eat a mash with egg yolk.

I had another girl about a week ago with weak legs, so I added poultry cell to their water. The selenium seemed to fix her up just fine, she’s now doing great. I let all 5 of the chicks I’m growing out drink that poultry cell water, and now this one seems to be fading. Could I have poisoned her?

She doesn’t seem to have any actual symptoms besides lethargy and it growing. No splay leg or weird anatomy in her throat or beak.

I’m stumped and would love some advice

 

[thecatumbrella]

Poultry Cell is incredibly vitamin rich, so I only offer it very sparingly.

Looks like your gray chick can stand. Can she walk? Does she not eat and drink on her own at all? How have you been feeding her? Do you have pictures of your brooder setup?

Sorry for all the questions, but getting as much info as possible could help piece this together.