If you are seeing the vet again, take some random samples of poop from your flock to have them run fecal float tests on them. This is to check the flock, not just a dead chicken.
Have you checked the feed for mold? Do you have a decent sense of smell? Sniff the run bedding and coop bedding. Mold smells. For so many of your chickens to have crop disorders, something in the environment should be suspected.
I take it these chickens are not two years old yet if they aren't molting. Ask the vet for an antibiotic to treat your flock. A bacterial infection could be behind this runny poop. Ask for a med that is not in the penicillin family as those will aggravate crop yeast.
Have you checked the feed for mold? Do you have a decent sense of smell? Sniff the run bedding and coop bedding. Mold smells. For so many of your chickens to have crop disorders, something in the environment should be suspected.
I take it these chickens are not two years old yet if they aren't molting. Ask the vet for an antibiotic to treat your flock. A bacterial infection could be behind this runny poop. Ask for a med that is not in the penicillin family as those will aggravate crop yeast.