Hello, I just went though this with my black star. Poops were just as you described. She'd sit and pump like trying to lay, also labored breathing, now and then. I gave her a lightly warm bath 3 times a week in one half cup Epsom salt in a dish tub. No rinse, pat dry gently. Also, detoxed with Lily of the Valley Aloe Vera 80, 2 Tbsp in gal. of water and moistened her mash with it. She stayed in a hospital cage for a 2 weeks. When I returned her to the coop, because she was getting depressed. She was not able to get up on the perch. So I had her sleep in a box on the floor of the coop. I have since learned, it is important they not jump during this time, as they can rupture the skin and die. I decided to make a truss that attached to a saddle to support and protect her belly. Each morning and evening I would rub some herbal healing cream "The Rub", on her hot little belly. I would feed her fresh greens, black grapes, minced apple, meat, cooked grains: oat groats, wheat berries, brown rice, and layer mash free choice. After 6 weeks, I finally took her to see the vet. He diagnosed her with a hernia and congested heart which caused her to pant. No egg was felt when he palpated her belly. He said it was nothing I did or did not do that caused it. Just some breeds suffer with this. No need to euthanize, take her home and let her live out her days. So, I brought her home and continued to provide the supportive care. And, a week and a half later I noticed her walking better. Her swelling went down and she was later running around with the other hens! After 9 weeks she is back to normal. She has not laid an egg since this all started and may never. But, that's OK with me...I am thankful to God for her little life. She is a joy to have in my flock of pet chickens.