Another possibility is neuro-toxin poisoning. Also contaminated water.
Have you brought any paint thinner or insecticide into the coop? What's on the "ground" where these chicks have been? Plain soil? Sand? Wood shavings? What kind - pine or cedar?
Have the chicks been getting treats? Have you supplied grit?
The water supply - is there fracking and gas extraction going on near you that could be affecting water quality? Perhaps humans can survive this kind of contamination, but baby chicks cannot.
Have you brought any paint thinner or insecticide into the coop? What's on the "ground" where these chicks have been? Plain soil? Sand? Wood shavings? What kind - pine or cedar?
Have the chicks been getting treats? Have you supplied grit?
The water supply - is there fracking and gas extraction going on near you that could be affecting water quality? Perhaps humans can survive this kind of contamination, but baby chicks cannot.
