I love your 'tude! I identify! Chickens are the most absorbing hobby I've ever had. I am busy cutting down trees, working my garden plots, stalking noxious weeds all summer, but I always manage to spend hours with my chickens. I even tuck them in at night, refereeing squabbles.
Your friend with...
If you're going to be digging around in the deep litter in your run, you would be wise to wear a mask to filter out any aspergillus mold spores that may become air-born. If you encounter any black molds, those are likely aspergillus molds. You can kill these spore with a bleach/water solution...
It's possible for your youngest chickens to be undernourished due to being chased away from the food. Sometimes it's necessary to provide a second feeding station for the very young in the flock until they grow enough self confidence to assert themselves at the feeder.
I will stick an old card...
I've had problems with a hen getting sick from a compost pile. She's a Cream Legbar and excavates to the bitter bottom. In spring, after a wet winter and neglect of my compost pile, it had become slimy and very wet at the bottom. The clue is a "swamp" odor, much like the one coming out of all...
First of all, botulism spores are present in the soil and do not turn into a toxin until anaerobic conditions are present. That means as long as the soil is turned over and oxygen is present in the soil particles, no toxin can grow.
The rat poison is the culprit I would look at first. Cyanide...