In NZ people talk about sheep getting pleuresy, I understand from being in damp areas. The names farmers give diseases are a bit odd here sometimes though and it could be pneumonia they mean not sorted out completely. But anyway results in a cough, that can sound awfully uncomfortable. Unfortunately they dont seem to do anythng for it. But that is another possibility. Check that her breathing is normal, doesnt sound thick and harsh. If it does talk to a vet about whether she needs antibiotics or not.