Help! Babies dying everyday & not sure why

[Egg-O-Matic]

I purchased 29 chicks from Murray McMurray hatchery. 15 silver dorkings, and 14 other breeds. I picked them up the moment they arrived at the post office and 4 dorkings were dead upon arrival. I've had them in a large jacuzzi tub in the bathroom- heat, food (with some chick grit), & water. Everyone has been fine for a week. Until 3 days ago when I found a dorking dead. Then another one a day later and today is the 3rd day in a row that I have a dead chick- this time a dark cornish. Anything I should look for? I've been watching these guys intensely and they all seem fine- running around, spread out evenly under the heat lamp. I did notice the ones that had died had an enlarged area below their throat- croup maybe? I tried to take a pic of it below:

I'm thinking my next step should be to move them an enclosed room in the barn for some different air? I appreciate any input!

 

[Kiki]

Are you heating only one side of the "brooder"?
Grit is only needed if they are eating other things beside chick feed.

How is their poop?

 

[Egg-O-Matic]

Yes, only heating one side of the brooder. I had planned on putting some sod in there for them, but held off due to them dying. I didn't want to add any more variables.

 

[Kiki]

Have you read about this :
Cocci Facts

You may want to invest in some Corid.

 

[Kiki]

I see you have already been researching cocci.
Just because your chicks got the "shot" and some eat the medicated feed doesn't mean they can't or won't get it.
I would bet money you are dealing with Cocci.
Get some Corid asap.

 

[Egg-O-Matic]

Thank you!!! I have Corid, I will add it to the water right away. What dosage for week old chicks?

 

[BYCforlife]

I hear that if you feed vaccinated chicks kedicated feed they don't do too well with that. I have mever tested, but it might be possible.

 

[Kathy Forsythe]

I purchased 29 chicks from Murray McMurray hatchery. 15 silver dorkings, and 14 other breeds. I picked them up the moment they arrived at the post office and 4 dorkings were dead upon arrival. I've had them in a large jacuzzi tub in the bathroom- heat, food (with some chick grit), & water. Everyone has been fine for a week. Until 3 days ago when I found a dorking dead. Then another one a day later and today is the 3rd day in a row that I have a dead chick- this time a dark cornish. Anything I should look for? I've been watching these guys intensely and they all seem fine- running around, spread out evenly under the heat lamp. I did notice the ones that had died had an enlarged area below their throat- croup maybe? I tried to take a pic of it below:

I'm thinking my next step should be to move them an enclosed room in the barn for some different air? I appreciate any input!

Dip beak in water, and feed game starter mash or crumble. Hope you have marbles for water. and do not over heat. Star

 

[Kiki]

Do you have the powder Corid or the liquid.
what percentage too?

 

[Kiki]

#1 <<<<corid dosing is here