Need some relatively urgent help from some chicken experts here. My black sex link is sick. She's acting drunk, wobbling around, crossing one foot over the other when she walks. She's lost a substantial amount of weight over the last two days, but this is the first day I've seen the drunk behavior. Any idea what this could be? I have two other chickens. Are they at risk? Is there a chance that they are already sick but asymptomatic? I have four dogs. Are they at risk? Edit: hen is about 2-3 years old.