I have a 2 1/2 Y/O buff orpington who has been laying well until about 5 days ago, when the color of her eggs changed from brown to white and the shells became very thin. Last night she layed a soft shelled egg during the night. While she's not really pale, her comb is lighter than its usual vibrant red. I looked up causes of pale egg shells and read it's the result of stress, usually parasites. The flock was recently wormed with safeguard, the last treatment was one month ago. Since that time we've had a lot of rain - conditions here in north Florida have been perfect for worm soup, and I know the girls have been drinking out of puddles. The feathers on her backside are clean, but some of the other hens are starting to show evidence of loose, messy poops. My question is, can I safely worm this hen again? She is due for treatment for mites, although there is no sign she has them. Should I wait to see how she does after treatment with Frontline before thinking about worming? Should I be looking for a cause other than parasites for the changes in the quality of her egg shells? The flock free ranges and has layer pellets, oyster shell and (cooked) egg shells available. I had only recently been thinking that this hen had never looked healthier - I guess it's always something! Thanks in advance for any advice.