In the last two weeks, most of my hens have quit laying and one appears to be losing substantial weight—I don't have a scale but her keel is recently more prominent. I thought it was due to an overly aggressive rooster, but now I'm concerned it could be intestinal worms. All birds are eating, drinking, and preening (apparently) normally. I've isolated the skinny hen and I'll be able to check for worms via microscope tomorrow. I'll have goat wormer soon, I have a guide for diluting it, and I know how to administer the drug. Does wasting like this indicate worms ? Should I be looking more in the Marek's direction ? I would really appreciate any thoughts, advice, or tips anyone has to offer. Thanks in advance.