White leghorn nearing 9 or 10 years. Hasn't legged egg with shell in couple years but regularly drops egg white, occ. some yolk, at night on roost. Vet said she is old and no longer producing shell. We give her calcium and probiotics. She often shows fluid build up below the vent on stomach area, but it goes away, presumably when she gets rid of fluid. A couple other times she got bad and didn't move much then would clear out and be fine again. Has been 100+ degrees last couple days, but we keep shaded areas wet and all of the other hens are fine, but most are younger. Today her crop area is also full of liquid and she began vomiting white creamy looking stuff, and she is very full of liquid on the back end too. Too late in day to call our vet, so we are wondering of others might know what's going on. I'm thinking maybe an infection or blockage. Our grass fields have dried out and we have a lot of stickers around too. Could it be heat stress at her age? Tumor or organ failure?