This has happened to 4 chickens, they begin behaving oddly in the beginning of the day, sometimes I don't notice it until about mid-day, they begin stumbling, having trouble walking, and have extremely sudden lost a lot of weight, through the day they start eating less, and laying down a lot, when it gets severe they stop walking and keep trying to sleep. The last one that died she refused to eat, all she wanted to do was sleep, eventually she died, though she died after a lot of obvious suffering, difficulty breathing and rather violent spasms. The first two that died I had thought they were malnutritioned because the other chickens didn't let them eat much, and they had begun these symptoms a few days before I found them, it looked like they had just fallen over and died when getting up that morning. Besides the ones that died i've had three chickens who keep lapsing into these symptoms but being just fine after some warmth, food, and sugared water, but the ones that died refused water and food. None of them are breathing oddly, they aren't egg bound, I checked for that, not constipated, I just can't figure out whats wrong. Before these deaths I had 14 chickens, i'm down to 10 now. I'm in florida so we only had a short cold spell, and during that time they had light and heat in their coop. I've had chickens for two years now and never had anything like this happen, I don't understand it and i'd really like not to lose any others. The ones that have died were a bantam brahma cockrel, at around 5 months old, had not crowed yet, (he was always very odd though). A game hen, approximately 2 years, (we got her from a friend who didn't want their chickens anymore). And two Austrolorp hens, both gotten with the game hen. I got the game hen with her sister, who has a beak deformity, and four austrolorps, at the time I had a mystery cockrel, the brahma cockrel, a Bantam cochin pullet, two leghorn pullets, two adult red hens, one adult mix hen, and an adult austrolorp. Please help, i'd like to get this issue solved quickly so I can do something about it, I really don't want to lose anymore of my chickens, they're like family to me. Thanks in advance.