I have a hen thats now a year old that I ordered from mcmurray hatchery as a started pullet. Shes a production red that does not produce! Lol. Ever since she started laying most if her eggs are soft shelled. I'm feeding my hens dumor layer and they have oyster shell. I've never had a problem with rubbery eggs until this hen. The weird thing is only half of her eggs are soft. I have a picture of one of her 'good' eggs and you can see a stripe on the top. That top area is usually the soft spot that pops all over the nest box. Yuck...any ideas on what causes this? Just a bad reproductive system?