My last pup had a light yellow discharge. .My vet said that is nothing to worry about. She is 9 months now, has not been spayed yet(will be) and she "outgrew it". It does not sound right to me that the discharge is green.The green color does not sound normal to me-but maybe someone else here can offer better advice.The amount sounds a little excessive. I would want a swab taken and have it checked out.