I have a doeling about a yr and a half old. Her udder started swelling and is now about the size of half a football. She has never been in milk and is not in milk now. Her udder is not warm. A friend told me to massage with warm water. I started today. I tried to milk her out and just got a lot of clear liquid. Does this sound like mastitis? How much peppermint oil do you rub with?