umean babies human? Ok, I looked it up , its a mutlti-vitamin, so normally I would say , dont worry, give it as much as you want, the body eliminates what it doesnt need (this isnt true of oil soluble vitamins). The problem is it contains IRon. I will try and research how iron and poultry get along.
I have found several studies where chicks were given iron supplements but I can not find a dosage. Several studies indicated the the chicks were intravenously Fe-59, so I think they can probably tolerate it. My suggestion give them the smallest dosage on the label.
I always give my new born chicks Pedialyte, it has the main electrolytes and probably too much sugar, but that gives them the energy to get up , get around, and eat the Gel-grow. Potassium, sodium and chloride are minerals known as electrolytes. In the body, they are vital for proper cell function and growth and other than sugar, thats all it has in it.