>>>>Do not give antibiotics<<<<<
Actually not giving them antibiotics was the correct decision. Never ever give antibiotics unless you're very certain that there's a true bacterial condition present. (By the way, coccidiosis isn't bacteria.)
Also straight milk is a no-no for birds. They aren't lactose tolerant. We're able to give them certain milk products because they contain bacteria that digest the lactose (yogurt for example). But you don't want to give them to birds taking terramycin, any ....mycin drug, or tetracycline.
it's important for young birds to be getting the correct nutrition, enough of it, clean water, and that their gut bacteria be healthy and established correctly otherwise they don't digest their food.
What are you feeding these birds? Hopefully they're on chick starter with amprolium (not antibiotic medicated feed.) At this age, that's what they eat. Game bird starter will work too but only if you're experienced at raising chicks and can easily recognize coccidiosis almost before it starts.
Feel their keels. The babies should be a good weight - not thin. Their droppings should be solid with white urates. Occassionally you'll get a cecal poop - that's ok. But the majority of poops should be solid. If they're not, start with probiotics - live bacteria laced diet enhancers.
I would probably avoid vitamin/electrolyte mixtures as the feed should be doing its job. Especially because brooders are heated, and the light/heat will just deactivate the vitamins in the water, leaving a solution in which bacteria grow really easily. You won't hear THAT from a hatchery that wants to sell you those packages! Instead, if you want, mix as directed (but in smaller amounts) and use that water to make the moistened mash with the yogurt or other probiotic if medicating.
Talk to us about your brooder, the temperature of the brooder and where the chicks are, what your feed is exactly, your bedding, etc please and we'll go from there. Also please - what are the droppings' consistencies.
