Last night my 4 yr old hen was sitting on the floor of the coop - never a good sign. She's still heavy (not emmaciated yet), and this was the first sign of a problem (she was out with the flock the day before). She won't stand and seems to be fading fast. Her lower abdomen seems "full" and kinda mushy (not super rigid). No runny eyes/nose etc. If she's blocked or egg-bound, how would I know? What can I do? I'm not squeemish - was a vet assistant for 3+ years, have LOTS of animals. HELP! and thanks