I just bought a 2 year old heifer (jersey). She's never been bred before but she already has a pretty large bag. We tried milking her last night to see if there was anything in it and she does have some milk. We've never heard of anything like this before and our vets advice was to "sell her" If anyone knows anything about this we would appreciate hearing about it. Before we bought her she was kept with a jersey cow. She hasn't been around other calves or bulls. Thanks