Is it possible that a non-pregnant dog has milk in her nipples? I noticed that they were a bit larger than normal and I squeezed one and milk came out! she doesn't look pregnant. She was with another dog (male) about december but she doesn't look pregnant. She's a little bit chubby than normal but we know she's not pregnant because last time she was pregnant she was extremely large. So can she have milk even though she's not preggo? thanks for any advice