Tracheal collapse in three calves.
D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000175:diagnosis / Q000209:etiology*; D004417:Dyspnea / Q000209:etiology / Q000662:veterinary; D011859:Radiography; D014132:Trachea / Q000002:abnormalities* / Q000000981:diagnostic imaging