We just got four baby chicks. We've had them 5 days, so I guess they are 7-8 days old. One of them is sick. The place where we bought them vaccinated them, though I didn't think to ask for what. We are feeding them medicated feed. Yesterday the sick chick stopped running as much as the others. It was lethargic and breathing heavy. Last night we fed it some chicken probiotics dissolved in water with some mashed up feed. It seemed to perk up and jumped out of the box we had her in to separate her from the other chicks. This morning she's lying down flat with her wings spread and is breathing really heavy. She seems really sick. I don't know what to do. Is there any use in calling a vet who will make house calls? Is it worth it to bring her to a vet? Thanks.