Im so sorry! The other 2 will eventually come around. If you wanted to contact your state vet through the department of Agricultural, alot of times they will do a free necropsy to find out how she died, then you will know for sure what your dealing with. But yes if you suspect worms, and they can kill if bad enough, id go ahead and treat the other 2
I'm not sure I want to bother with a necropsy - if it is something that virulent it won't matter, the other two probably have it already - although I really hope not. I'll just dose them, scrub the daylights outt of the coop :(and hope for the best. It's just really strange how whatever it was killed her so fast.
Might be a good idea to have a fecal done on your live birds to find out if they have worms.
Edited by casportpony - 12/14/16 at 6:24am