Yes, give her more calcium, another Tums. You are not going to hurt her with this, it's short term treatment, calcium issues arise from long term use of too much. If she is having trouble passing something, it will help. I suspect this is some kind of reproductive problem, but trying the calcium is logical. In laying hens over the age of two reproductive problems are not uncommon, and high laying breeds, of which she appears to be, have a higher percentage. It's often very hard to know for sure until necropsy, symptoms can be very similar. It could be internal laying, salpingitis, or a cancer. They hide symptoms really well so often it's not known until it's advanced.
