I have about 90 hens and they were good until about 2 weeks ago. It started with one and now I'm losing 1-2 a week if not more. and I have injured ones that will probably be next. They have supplements and food, they have the option to go outside and I give them a leaf of hay every day to keep them busy for a bit. I'm at my wits end, and worried my flock will dwindle to nothing. I don't know what to do!