Hi Jose
Sorry to hear that. Try a poultry bird wormer treatment that states it treats gape worm - not all bird wormers treat gape worm so read the instructions or ask your local pet supplies as they should be able to get it in stock. Good luck!
Hi Jose
It may be Gapeworm? Does your chicken look like it is gaping for air?
I bought gapeworm treatment and sorted out the issue but requires redose after a couple of weeks