I have 3 buff orpingtons and 3 Rhode Island Reds. I used to have 4 Reds, but a pack of dogs got on our property yesterday and scared the chickens into flying around hysterically within their cage. The dogs could not get to the birds, but while they were frightened, one of the RIRs flew right into the roof of their cage, broke her neck, fell down and died. That was bad enough. Then today, I noticed that one of my buffs was panting when it was not hot and lacked the energy she normally has. She normally plays vigorously when allowed her hour of free range time in the afternoon, but today, she hardly moved at all. Also, I noticed that her crop is kind of floppy and alot paler than the other two buffs. I have segregated her in an extra chicken tractor that I have, so that if she is infectious that she will not pass the problem along to the other birds. I have also started her on vitamins & electrolytes in her water, as well as terramycin. It's not that I know this is the right thing to do, it's just that I needed to do something, and this is about all the veternary "tricks" that this newbie chicken father has up his sleeves. Should I put vitamins & electrolytes in the water in the other chickens pen as well? They normally eat layer feed with a little bit of scratch right before bedtime, and they get plenty of grass and bugs during their hour of free range play in the late afternoon? Should I give them antibiotic too? Can you eat the eggs of chickens that partake of antibiotics? I hope my questions are not too dum. This is my first experience as a chicken father. Thank you in advance for your help and insights.