My 7yr old hen is constipated again. She's been straining and some poop is coming out. There is some blood in the stool. They vet can't see her until tomorrow afternoon. I'm very concerned about the bloody stool and how little has come out. She is inside in a crate eating and drinking quite a bit, walking around and acting normal except for the occasional straining. It's also been hot, dry and windy today. She has free access to clean water all the time and eats layer crumbles. Should I be concerned? Is the blood from straining? How can I help her move things along?