Lethargic baby chick, what to do?

[NoFlyBackFarm]

I doubt it was the wrong food. It may have been genetic. I've heard that crosses of breeds on opposites of the side spectrum can cause non-fertilization or early death. That is my opinion anyway.

 

[NoFlyBackFarm]

I doubt it was the wrong food. It may have been genetic. I've heard that crosses of breeds on opposites of the side spectrum can cause non-fertilization or early death. That is my opinion anyway.

They were welsummer mix probably.

 

[Wyorp Rock]

They're being kept in a small pet carrier with a heat lamp at night,

go into a small coop during the day

I'm sorry for your loss.
Can you please give us more information?

Photos?
How warm are you keeping the chicks?
How old are they?
Do they have room to get away from the heat? Do you provide heat outside in the coop when you take them out?
Where did you purchase your chicks?
The remaining chicks are the "commercial" one? Are they meat birds?

We ask questions because sometimes it's hard to visualize what you are saying.
In general, depending on how small the pet carrier is, they could be overheating if you are keeping them indoors and have a heat lamp on them. They need only one warm spot and the rest of the brooder stays cool. Food and water stay on the cool side.

If they are going outside, what are your temperatures like? A lot of people do keep chicks outdoors, that's fine. Depending on age, weather conditions, etc. they may need a heat source during their outside time.

Feed sounds o.k. chick starter is for babies. Sometimes crumbles can be hard to eat for tiny bantam chicks, if they have trouble, you can remedy that by grinding the feed smaller or soaking a small amount in warm water for 1/2hr and give them wet feed.

 

[eggswithlegs11]

The yellow ones are just over 2 weeks old, and the hybrids would have been a week old today. The inside cage they have at night is like this:

(Except without the water and hut component). I don't think they were too hot because the hybrids body heat seemed a little lower, whereas the yellow chicks were appropriately warm. Their outside cage is like this:
It's usually around 25-28 degrees Celsius outside so I don't give them a heat lamp, but allow them sun and shade (I have a cover over half the roof).
I purchased the chicks from a produce place that has a lot of livestock as well as food and housing for pets. It wasn't a pet shop, they have like pigs and horses on the sight. These chickens were initially bought as egg layers cause my parents wanted more home grown eggs, and we decided we'd have them as chicks. They didn't tell me anything other than the chicks being commercial, looks like they might turn out being ginger looking chickens, not white though. I don't have any photos of the chicks on me at the moment, sorry.

Thank you all for your help

 

[Wyorp Rock]

They will outgrow the cage very quickly. I would put a thermometer in there to see how warm it is.
Have your heat lamp pointing only in one place, the cage does not need to be all the same temperature.

It's good that the 2 older ones seem to be doing well. Just keep watch that they are eating/drinking and active.