After losing my two beautiful chickens to a sneaky fox, I bit the bullet and bought two new chicks last weekend from a local hatchery. I know it was dumb, but I didn't think to ask if the chicks were vaccinated. Especially now that one of them is very sick and I don't know why. She has yellow diarrhea which is the texture of egg yolk. I have been keeping her bottom clean all day, but this morning when I greeted her, her down was quite matted. On top of that, she seems to be throwing up a clear substance anytime I dip her head into the water to drink. She is not touching her crumbles and won't even drink without being forced. About an hour ago I added duramycin-10 to her water. She is just standing still for the most part, occasionally walking around or laying down. Her breathing seems a bit labored, but not too bad. Any idea what may be wrong with her or how I can better treat her? Thanks so much for the help, I can't bear to lose another chicken after my last two!