I did some research on the effects of loud noise on poultry, and came up with nothing more than noise can adversely affect egg laying, decreasing production. Nothing about effects on chicks.
Then I coaxed up some info on the effects of loud noise on the brain. Have you ever heard of the "Havana Syndrome"? Over the past several years US diplomats in Cuba were suffering brain damage and painful side effects from what they believe were some kind of sound weapon directed at them. No proof of any definite cause, though.
Loud noise does injure and destroy nerve fibers in the brain, causing damage. If sound is of the right wave length and intensity, it has the capability of causing injury to the brain. The sudden, intense percussion of kicking the metal tub may have produced a freak sound wave of just the right wave length to destroy the brains of those two chicks lying in its path. The other chick was out of range or it may have suffered the same fate.
If this is what happened, it was the freakiest of circumstances and even if you tried, you probably could not recreate it. Not that you'd want to.
The surviving chick should be fine. If it was going to get constipated, you'd see signs by now. Oil will not cause any harm if you give it some to be absolutely safe. I would suggest doing that.
Then I coaxed up some info on the effects of loud noise on the brain. Have you ever heard of the "Havana Syndrome"? Over the past several years US diplomats in Cuba were suffering brain damage and painful side effects from what they believe were some kind of sound weapon directed at them. No proof of any definite cause, though.
Loud noise does injure and destroy nerve fibers in the brain, causing damage. If sound is of the right wave length and intensity, it has the capability of causing injury to the brain. The sudden, intense percussion of kicking the metal tub may have produced a freak sound wave of just the right wave length to destroy the brains of those two chicks lying in its path. The other chick was out of range or it may have suffered the same fate.
If this is what happened, it was the freakiest of circumstances and even if you tried, you probably could not recreate it. Not that you'd want to.
The surviving chick should be fine. If it was going to get constipated, you'd see signs by now. Oil will not cause any harm if you give it some to be absolutely safe. I would suggest doing that.