Intussusception of the proventriculus of chickens.
D000818:Animals; D002645:Chickens; D005260:Female; D007443:Intussusception / Q000473:pathology / Q000662:veterinary*; D008297:Male; D011201:Poultry Diseases / Q000473:pathology*; D011531:Proventriculus / Q000473:pathology*