bagged up not pregnant

My oldest (8-10 yr) doe kidded in September 2014. I milked her for several months but when she was below a pint I let her dry up. She is penned with 4 other does who are being milked, about half an acre of pasture. Next pen has a 2 year old doe and 5 kids (4 and 5 months). The bucks are far off...