Loosing chickens fast!

What state are you in? Most state vet labs will do a necropsy and testing on chickens that die, if the body is kept cold, not frozen. They will identify the certain respiratory disease present. Both MG and infectious coryza are respiratory diseases that cause swollen eyelids and serious respiratory symptoms. Did you notice a bad odor from the beak or face from the sick birds? Tylosin can be used to treat MG, while coryza is better treated with sulfadimethoxine or SMZ TMP (bactrim.) Here is where to find your state vet lab for a necropsy if you lose another.
https://www.metzerfarms.com/poultry-labs.html
 
I would look for any more worms on fresh droppings and take a picture. As debbie said, round worms are long thin and cream colored. Tape worms are small like grains of rice and may be moving. Tapeworms require praziquantel to treat them effectively. They make praziquantel tablets, droncit and drontal tablets with it, and for chickens, Equimax horse paste with praziquantel is cost effective. Dosage is 0.16 ml given orally once, and repeated in 14 days. Round worms are best treated with Valbazen 1/2 ml once and again in 10 days, or SafeGuard Liquid Goat Wormer 1/4 ml per pound given for 5 days in a row. Ivermectin has lost it’s effectiveness on worms in recent years.
I will look this evening when I get back home to see if I can find any more worms.
 

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