
Hi
I've just gone through this, the vet at frist thought it was possibly an infection, but as she showed no other sign of any illness, I got a second opinion and that vet believed it was hormonal. If it is like a season, I wouldn't be too worried, but if there is a smell that comes with it then you should probably talk to your vet. It may dissapear over time as the milk starts to dry up and the hormones settle.