Antibiotics and vitamins are the same whether they go into humans or animals or fish. Those labeled for fish are available without prescription so that's what we use for chickens. But they are the same antibiotics that we use for humans, just labeled for fish. It fools a lot of people. And that...
This can treat intestinal bacteria and also coccidia and doesn't require a prescription. https://www.valleyvet.com/ct_detail.html?pgguid=A82E4C21-5F3B-44AC-8641-38AA87B04D57 I wouldn't use it now, but have on hand in case the chicks begin acting sick.
Blood is ruby red, not this orange color which indicates intestinal shed. The shed is normal from time to time, but if all the chicks are producing it regularly, and especially if it increases in amount, it could be a signal that bacterial infection is developing in the intestines. This would be...