Use vinegar as recommended by Xavi.. It's work for sure.. Meanwhile, u may give them BEXTON which can get from your nearest pet shop or vet.. Goodluck..

And dont forget to separate / quarantine them..

stop giving her/him vege and fruit.. tat is the source of berak cair... becos its digestion is not well now.. it bes u get her/him to c a vet. sound like a diarrhea to me.. give him/her more hay and pellet.. ur pig is like my choco last time.. took me 3 month to heal her becos i was inexperience then as i keep giving her vege and fruit. during diarrhea.. it is best to stop those intake and jus give hay and pellet... if u able to get oxbow critical care pack and vita c supplement then it is best lor.. if u visit Dr. yeoh , he will give u 1 bottle of antibiotic , inflamation pill, and multivitam (cost to expect rm39++)

I was planning to get GP soon, anyone know a good breeder in Penang? I don't prefer to get GPs from pet shops as most of them are sicked.