I have a Brahma hen that will be 1 yr. in October, she has been laying for a while with no problems, but the last couple times she laid the eggs have been perfect but the feel like water balloons, she gets purina layena and also oyster shell plus meal worms and yogurt etc. What I mean by water balloons is they have a shell but it's very soft with the inside intact. does anyone know what could be causing this problem?